【新增】新增【lime-painter】海报画报插件,初步实现普通商品丰富的海报功能,其他业务模块会持续增加。

This commit is contained in:
大灰灰
2022-08-03 21:18:03 +08:00
parent acf0c28239
commit afdb17b880
22 changed files with 2946 additions and 3 deletions

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@@ -74,7 +74,7 @@
}
},
mounted() {
// console.log("类型:" + this.shareType);
// console.log("类型:" + this.shareType);
},
methods: {
// 关闭弹出层
@@ -183,7 +183,16 @@
this.$u.api.share(data).then(res => {
if (res.status) {
this.close()
this.$u.route('/pages/share/sharePoster/sharePoster?poster=' + encodeURIComponent(res.data))
if (this.shareType == this.$globalConstVars.shareType.goods) {
//data.posterUrl = encodeURIComponent(res.data);
data.params.posterUrl = res.data;
data.params.shareType = this.shareType;
this.$u.route('/pages/share/shareNewPoster/shareNewPoster' + uni.$u.queryParams(data.params))
} else {
this.$u.route('/pages/share/sharePoster/sharePoster?poster=' + encodeURIComponent(res.data))
}
} else {
this.$u.toast(res.msg)
}

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@@ -147,6 +147,13 @@
"navigationBarTitleText": "分享"
}
},
{
"path": "pages/share/shareNewPoster/shareNewPoster",
"style": {
"navigationBarTextStyle": "black",
"navigationBarTitleText": "新版分享"
}
},
{
"path": "pages/form/details/details",
"style": {

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@@ -0,0 +1,2 @@
.share-img { box-shadow: 0 0 210px #ccc; width: 90%; }
.share-bot { width: 90%; margin: 0 auto; }

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@@ -0,0 +1,226 @@
<template>
<view>
<u-toast ref="uToast" /><u-no-network></u-no-network>
<u-navbar title="分享" safeAreaInsetTop fixed placeholder>
<view class="coreshop-navbar-left-slot" slot="left">
<u-icon name="arrow-left" size="19" @click="goNavigateBack"></u-icon>
<u-line direction="column" :hairline="false" length="16" margin="0 8px"></u-line>
<u-icon name="home" size="22" @click="goHome"></u-icon>
</view>
<view slot="right">
</view>
</u-navbar>
<view class="coreshop-flex coreshop-justify-center coreshop-padding-10">
<image :src="path" mode="widthFix" style="width: 100%;"></image>
<l-painter ref="painter" custom-style="position: fixed; left: 200%" css="width: 750rpx; padding-bottom: 40rpx; background: linear-gradient(,#ff971b 0%, #ff5000 100%)">
<l-painter-image :src="userInfo.avatarImage" css="margin-left: 40rpx; margin-top: 40rpx; width: 84rpx; height: 84rpx; border-radius: 50%;" />
<l-painter-view css="margin-top: 40rpx; padding-left: 20rpx; display: inline-block">
<l-painter-text :text="userInfo.nickName" css="display: block; padding-bottom: 10rpx; color: #fff; font-size: 32rpx; fontWeight: bold" />
<l-painter-text text="为您挑选了一个好物" css="color: rgba(255,255,255,.7); font-size: 24rpx" />
</l-painter-view>
<l-painter-view css="margin-left: 40rpx; margin-top: 30rpx; padding: 32rpx; box-sizing: border-box; background: #fff; border-radius: 16rpx; width: 670rpx; box-shadow: 0 20rpx 58rpx rgba(0,0,0,.15)">
<l-painter-image :src="goodsInfo.image" css="object-fit: cover; object-position: 50% 50%; width: 606rpx; height: 606rpx; border-radius: 12rpx;" />
<l-painter-view css="margin-top: 32rpx; color: #FF0000; font-weight: bold; font-size: 28rpx; line-height: 1em;">
<l-painter-text text="¥" css="vertical-align: bottom" />
<l-painter-text :text="products.price" css="vertical-align: bottom; font-size: 58rpx" />
<l-painter-text text="元" css="vertical-align: bottom" />
<l-painter-text :text="'¥'+ products.mktprice" css="vertical-align: bottom; padding-left: 10rpx; font-weight: normal; text-decoration: line-through; color: #999999" />
</l-painter-view>
<l-painter-view css="margin-top: 32rpx; font-size: 26rpx; color: #8c5400">
<!--<l-painter-text text="自营" css="color: #212121; background: #ffb400;" />
<l-painter-text text="30天最低价" css="margin-left: 16rpx; background: #fff4d9; text-decoration: line-through;" />
<l-painter-text text="满减优惠" css="margin-left: 16rpx; background: #fff4d9" />-->
<l-painter-text :text="goodsInfo.brief" css="margin-left: 16rpx; background: #fff4d9" />
</l-painter-view>
<l-painter-view css="margin-top: 30rpx">
<l-painter-text css="line-clamp: 2; color: #333333; line-height: 1.8em; font-size: 36rpx; width: 478rpx; padding-right:32rpx; box-sizing: border-box"
:text="goodsInfo.name"></l-painter-text>
<l-painter-image :src="poster" css="width: 128rpx; height: 128rpx;" />
<!--<l-painter-qrcode css="width: 128rpx; height: 128rpx;" text="limeui.qcoon.cn"></l-painter-qrcode>-->
</l-painter-view>
</l-painter-view>
</l-painter>
</view>
<view class="share-bot flex flex-direction coreshop-flex coreshop-flex-wrap coreshop-font-sm coreshop-padding-top-10 coreshop-flex-direction-row coreshop-justify-between">
<view>
<u-button shape="square" type="primary" v-if="weiXinBrowser">
<u-icon name="download" :margin-right="20" label="长按图片保存到手机" color="#fff" labelColor="#fff"></u-icon>
</u-button>
<u-button shape="square" type="primary" @click="savePoster()" v-else>
<u-icon name="download" :margin-right="20" label="保存到本地" color="#fff" labelColor="#fff"></u-icon>
</u-button>
</view>
<view>
<u-button shape="square" type="primary" @click="goBack()">
<u-icon name="arrow-leftward" :margin-right="20" label="返回上一页" color="#fff" labelColor="#fff"></u-icon>
</u-button>
</view>
</view>
<!-- 登录提示 -->
<coreshop-login-modal></coreshop-login-modal>
</view>
</template>
<script>
export default {
data() {
return {
poster: '',
path: '',
userInfo: {},
goodsInfo: {},
products: {},
priceSection:'',
};
},
onLoad(options) {
var _this = this;
this.poster = decodeURIComponent(options.posterUrl);
this.userInfo = this.$store.state.userInfo;
uni.showLoading({
title: '加载中'
});
if (options.shareType == this.$globalConstVars.shareType.goods) {
let data = {
id: parseInt(options.goodsId)
}
this.$u.api.goodsDetail(data).then(res => {
if (res.status == true) {
console.log(res.data);
_this.goodsInfo = res.data;
_this.products = res.data.product;
setTimeout(function () {
_this.canvasToTempFilePath();
uni.hideLoading();
}, 1000);
} else {
_this.$refs.uToast.show({
message: res.msg, type: 'error', complete: function () {
uni.navigateBack({
delta: 1
});
}
})
}
})
}
},
computed: {
weiXinBrowser() {
return this.$common.isWeiXinBrowser()
}
},
methods: {
canvasToTempFilePath() {
var _this = this;
// 渲染
this.$refs.painter.render();
// 生成图片
this.$refs.painter.canvasToTempFilePathSync({
fileType: "jpg",
quality: 1,
success: (res) => {
_this.path = res.tempFilePath;
},
});
},
goBack() {
uni.navigateBack({
delta: 1
});
},
// 保存海报到本地
savePoster() {
let _this = this;
// #ifdef H5
_this.downloadIamge(_this.path, 'image');
// #endif
// #ifdef MP || MP-ALIPAY || APP-PLUS || APP-PLUS-NVUE
_this.downloadImageOfMp(_this.path)
// #endif
},
//下载图片地址和图片名
downloadIamge(imgsrc, name) {
var image = new Image();
// 解决跨域 Canvas 污染问题
image.setAttribute('crossorigin', 'anonymous');
image.onload = () => {
var canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;
var context = canvas.getContext('2d');
context.drawImage(image, 0, 0, image.width, image.height);
var url = canvas.toDataURL('image/png'); //得到图片的base64编码数据
var a = document.createElement('a'); // 生成一个a元素
var event = new MouseEvent('click'); // 创建一个单击事件
a.download = name || 'photo'; // 设置图片名称
a.href = url; // 将生成的URL设置为a.href属性
a.dispatchEvent(event); // 触发a的单击事件
};
image.src = imgsrc;
},
downloadImageOfMp(image) {
let _this = this
// #ifdef APP-PLUS || APP-PLUS-NVUE
uni.downloadFile({
url: image,
success(res) {
uni.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success() {
_this.$refs.uToast.show({ message: '操作成功', type: 'success' })
},
fail() {
_this.$u.toast('图片保存失败')
}
});
},
fail() {
_this.$u.toast('下载失败')
}
})
// #endif
// #ifdef MP
uni.authorize({
scope: 'scope.writePhotosAlbum',
success() {
// 先下载到本地
uni.downloadFile({
url: image,
success(res) {
uni.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success() {
_this.$refs.uToast.show({ message: '保存成功', type: 'success' })
},
fail() {
_this.$u.toast('图片保存失败')
}
});
},
fail() {
_this.$u.toast('下载失败')
}
})
},
fail() {
//console.log('授权失败')
}
})
// #endif
}
}
};
</script>
<style scoped lang="scss">
@import "shareNewPoster.scss";
</style>

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@@ -0,0 +1,157 @@
## 1.9.3.52022-06-29
- feat: justifyContent 增加 `space-around``space-between`
- feat: canvas 2d 也使用`getImageInfo`
- fix: 修复 `text``text-decoration`错位
## 1.9.3.42022-06-20
- fix: 修复 因创建节点速度问题导致顺序出错。
- fix: 修复 微信小程序 PC 无法显示本地图片
- fix: 修复 flex-box 对齐问题
- feat: 增加 `text-shadow`
- feat: 重写 `text` 对齐方式
- chore: 更新文档
## 1.9.3.32022-06-17
- fix: 修复 支付宝小程序 canvas 2d 存在ctx.draw问题导致报错
- fix: 修复 支付宝小程序 toDataURL 存在权限问题改用 `toTempFilePath`
- fix: 修复 支付宝小程序 image size 问题导致 `objectFit` 无效
## 1.9.3.22022-06-14
- fix: 修复 image 设置背景色不生效问题
- fix: 修复 nvue 环境判断缺少参数问题
## 1.9.3.12022-06-14
- fix: 修复 bottom 定位不对问题
- fix: 修复 因小数导致计算出错换行问题
- feat: 增加 `useCORS` h5端图片跨域 在设置请求头无效果后试一下设置这个值
- chore: 更新文档
## 1.9.32022-06-13
- feat: 增加 `zIndex`
- feat: 增加 `flex-box` 该功能处于原始阶段,非常简陋。
- tips: QQ小程序 vue3 不支持, 为 uni 官方BUG
## 1.9.2.92022-06-10
- fix: 修复`text-align``margin`居中问题
## 1.9.2.82022-06-10
- fix: 修复 Nvue `canvasToTempFilePathSync` 不生效问题
## 1.9.2.72022-06-10
- fix: 修复 margin及padding的bug
- fix: 修复 Nvue `isCanvasToTempFilePath` 不生效问题
## 1.9.2.62022-06-09
- fix: 修复 Nvue 不显示
- feat: 增加支持字体渐变
```html
<l-painter-text
text="水调歌头\n明月几时有把酒问青天。不知天上宫阙今夕是何年。我欲乘风归去又恐琼楼玉宇高处不胜寒。起舞弄清影何似在人间。"
css="background: linear-gradient(,#ff971b 0%, #1989fa 100%); background-clip: text" />
```
## 1.9.2.52022-06-09
- chore: 更变获取父级宽度的设定
- chore: `pathType` 在canvas 2d 默认为 `url`
## 1.9.2.42022-06-08
- fix: 修复 `pathType` 不生效问题
## 1.9.2.32022-06-08
- fix: 修复 `canvasToTempFilePath` 漏写 `success` 参数
## 1.9.2.22022-06-07
- chore: 更新文档
## 1.9.2.12022-06-07
- fix: 修复 vue3 赋值给this再传入导致image无法绘制
- fix: 修复 `canvasToTempFilePathSync` 时机问题
- feat: canvas 2d 更改图片生成方式 `toDataURL`
## 1.9.22022-05-30
- fix: 修复 `canvasToTempFilePathSync` 在 vue3 下只生成一次
## 1.9.1.72022-05-28
- fix: 修复 `qrcode`显示不全问题
## 1.9.1.62022-05-28
- fix: 修复 `canvasToTempFilePathSync` 会重复多次问题
- fix: 修复 `view` css `backgroundImage` 图片下载失败导致 子节点不渲染
## 1.9.1.52022-05-27
- fix: 修正支付宝小程序 canvas 2d版本号 2.7.15
## 1.9.1.42022-05-22
- fix: 修复字节小程序无法使用xml方式
- fix: 修复字节小程序无法使用base64(非2D情况下工具上无法显示)
- fix: 修复支付宝小程序 `canvasToTempFilePath` 报错
## 1.9.1.32022-04-29
- fix: 修复vue3打包后uni对象为空后的报错
## 1.9.1.22022-04-25
- fix: 删除多余文件
## 1.9.1.12022-04-25
- fix: 修复图片不显示问题
## 1.9.12022-04-12
- fix: 因四舍五入导致有些机型错位
- fix: 修复无views报错
- chore: nvue下因ios无法读取插件内static文件改由下载方式
## 1.9.02022-03-20
- fix: 因无法固定尺寸导致生成图片不全
- fix: 特定情况下text判断无效
- chore: 本地化APP Nvue webview
## 1.8.92022-02-20
- fix: 修复 小程序下载最多10次并发的问题
- fix: 修复 APP端无法获取本地图片
- fix: 修复 APP Nvue端不执行问题
- chore: 增加图片缓存机制
## 1.8.8.82022-01-27
- fix: 修复 主动调用尺寸问题
## 1.8.8.62022-01-26
- fix: 修复 nvue 下无宽度时获取父级宽度
- fix: 修复 ios app 无法渲染问题
## 1.8.82022-01-23
- fix: 修复 主动调用时无节点问题
- fix: 修复 `box-shadow` 颜色问题
- fix: 修复 `transform:rotate` 角度位置问题
- feat: 增加 `overflow:hidden`
## 1.8.72022-01-07
- fix: 修复 image 方向为 `right` 时原始宽高问题
- feat: 支持 view 设置背景图 `background-image: url(xxx)`
- chore: 去掉可选链
## 1.8.62021-11-28
- feat: 支持`view``inline-block`的子集使用`text-align`
## 1.8.5.52021-08-17
- chore: 更新文档,删除 replace
- fix: 修复 text 值为 number时报错
## 1.8.5.42021-08-16
- fix: 字节小程序兼容
## 1.8.5.32021-08-15
- fix: 修复线性渐变与css现实效果不一致的问题
- chore: 更新文档
## 1.8.5.22021-08-13
- chore: 增加`background-image``background-repeat` 能力,主要用于背景纹理的绘制,并不是代替`image`。例如:大面积的重复平铺的水印
- 注意这个功能H5暂时无法使用因为[官方的API有BUG](https://ask.dcloud.net.cn/question/128793),待官方修复!!!
## 1.8.5.12021-08-10
- fix: 修复因`margin`报错问题
## 1.8.52021-08-09
- chore: 增加margin支持`auto`,以达到居中效果
## 1.8.42021-08-06
- chore: 增加判断缓存文件条件
- fix: 修复css 多余空格报错问题
## 1.8.32021-08-04
- tips: 1.6.x 以下的版本升级到1.8.x后要为每个元素都加上定位position: 'absolute'
- fix: 修复只有一个view子元素时不计算高度的问题
## 1.8.22021-08-03
- fix: 修复 path-type 为 `url` 无效问题
- fix: 修复 qrcode `text` 为空时报错问题
- fix: 修复 image `src` 动态设置时不生效问题
- feat: 增加 css 属性 `min-width` `max-width`
## 1.8.12021-08-02
- fix: 修复无法加载本地图片
## 1.8.02021-08-02
- chore 文档更新
- 使用旧版的同学不要升级!
## 1.8.0-beta2021-07-30
- ## 全新布局方式 不兼容旧版!
- chore: 布局方式变更
- tips: 微信canvas 2d 不支持真机调试
## 1.6.62021-07-09
- chore: 统一命名规范,无须主动引入组件
## 1.6.52021-06-08
- chore: 去掉console
## 1.6.42021-06-07
- fix: 修复 数字 为纯字符串时不转换的BUG
## 1.6.32021-06-06
- fix: 修复 PC 端放大的BUG
## 1.6.22021-05-31
- fix: 修复 报`adaptor is not a function`错误
- fix: 修复 text 多行高度
- fix: 优化 默认文字的基准线
- feat: `@progress`事件,监听绘制进度
## 1.6.12021-02-28
- 删除多余节点
## 1.6.02021-02-26
- 调整为uni_modules目录规范
- 修复transform的rotate不能为负数问题
- 新增:`pathType` 指定生成图片返回的路径类型,可选值有 `base64``url`

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@@ -0,0 +1,147 @@
const styles = (v ='') => v.split(';').filter(v => v && !/^[\n\s]+$/.test(v)).map(v => {
const key = v.slice(0, v.indexOf(':'))
const value = v.slice(v.indexOf(':')+1)
return {
[key
.replace(/-([a-z])/g, function() { return arguments[1].toUpperCase()})
.replace(/\s+/g, '')
]: value.replace(/^\s+/, '').replace(/\s+$/, '') || ''
}
})
export function parent(parent) {
return {
provide() {
return {
[parent]: this
}
},
data() {
return {
el: {
css: {},
views: []
},
}
},
watch: {
css: {
handler(v) {
if(this.canvasId) {
this.el.css = (typeof v == 'object' ? v : v && Object.assign(...styles(v))) || {}
this.canvasWidth = this.el.css && this.el.css.width || this.canvasWidth
this.canvasHeight = this.el.css && this.el.css.height || this.canvasHeight
}
},
immediate: true
}
}
}
}
export function children(parent, options = {}) {
const indexKey = options.indexKey || 'index'
return {
inject: {
[parent]: {
default: null
}
},
watch: {
el: {
handler(v, o) {
if(JSON.stringify(v) != JSON.stringify(o))
this.bindRelation()
},
deep: true,
immediate: true
},
src: {
handler(v, o) {
if(v != o)
this.bindRelation()
},
immediate: true
},
text: {
handler(v, o) {
if(v != o) this.bindRelation()
},
immediate: true
},
css: {
handler(v, o) {
if(v != o)
this.el.css = (typeof v == 'object' ? v : v && Object.assign(...styles(v))) || {}
},
immediate: true
},
replace: {
handler(v, o) {
if(JSON.stringify(v) != JSON.stringify(o))
this.bindRelation()
},
deep: true,
immediate: true
}
},
created() {
if(!this._uid) {
this._uid = this._.uid
}
Object.defineProperty(this, 'parent', {
get: () => this[parent] || [],
})
Object.defineProperty(this, 'index', {
get: () => {
this.bindRelation();
const {parent: {el: {views=[]}={}}={}} = this
return views.indexOf(this.el)
},
});
this.el.type = this.type
this.bindRelation()
},
// #ifdef VUE3
beforeUnmount() {
this.removeEl()
},
// #endif
// #ifdef VUE2
beforeDestroy() {
this.removeEl()
},
// #endif
methods: {
removeEl() {
if (this.parent) {
this.parent.el.views = this.parent.el.views.filter(
(item) => item._uid !== this._uid
);
}
},
bindRelation() {
if(!this.el._uid) {
this.el._uid = this._uid
}
if(['text','qrcode'].includes(this.type)) {
this.el.text = this.$slots && this.$slots.default && this.$slots.default[0].text || `${this.text || ''}`.replace(/\\n/g, '\n')
}
if(this.type == 'image') {
this.el.src = this.src
}
if (!this.parent) {
return;
}
let views = this.parent.el.views || [];
if(views.indexOf(this.el) !== -1) {
this.parent.el.views = views.map(v => v._uid == this._uid ? this.el : v)
} else {
this.parent.el.views = [...views, this.el];
}
}
},
mounted() {
// this.bindRelation()
},
}
}

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@@ -0,0 +1,27 @@
<template>
</template>
<script>
import {parent, children} from '../common/relation';
export default {
name: 'lime-painter-image',
mixins:[children('painter')],
props: {
css: [String, Object],
src: String
},
data() {
return {
type: 'image',
el: {
css: {},
src: null
},
}
}
}
</script>
<style>
</style>

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<template>
</template>
<script>
import {parent, children} from '../common/relation';
export default {
name: 'lime-painter-qrcode',
mixins:[children('painter')],
props: {
css: [String, Object],
text: String
},
data() {
return {
type: 'qrcode',
el: {
css: {},
text: null
},
}
}
}
</script>
<style>
</style>

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<template>
<text style="opacity: 0;height: 0;"><slot/></text>
</template>
<script>
import {parent, children} from '../common/relation';
export default {
name: 'lime-painter-text',
mixins:[children('painter')],
props: {
css: [String, Object],
text: [String, Number],
replace: Object,
},
data() {
return {
type: 'text',
el: {
css: {},
text: null
},
}
}
}
</script>
<style>
</style>

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<template>
<view><slot/></view>
</template>
<script>
import {parent, children} from '../common/relation';
export default {
name: 'lime-painter-view',
mixins:[children('painter'), parent('painter')],
props: {
css: [String, Object],
},
data() {
return {
type: 'view',
el: {
css: {},
views:[]
},
}
},
mounted() {
}
}
</script>
<style>
</style>

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<template>
<view class="lime-painter" ref="limepainter">
<view v-if="canvasId && size" :style="styles">
<!-- #ifndef APP-NVUE -->
<canvas class="lime-painter__canvas" v-if="use2dCanvas" :id="canvasId" type="2d" :style="size"></canvas>
<canvas class="lime-painter__canvas" v-else :canvas-id="canvasId" :style="size" :id="canvasId"
:width="boardWidth * dpr" :height="boardHeight * dpr"></canvas>
<!-- #endif -->
<!-- #ifdef APP-NVUE -->
<web-view :style="size" ref="webview"
src="/uni_modules/lime-painter/static/index.html"
class="lime-painter__canvas" @pagefinish="onPageFinish" @error="onError" @onPostMessage="onMessage">
</web-view>
<!-- #endif -->
</view>
<slot />
</view>
</template>
<script>
import { parent } from '../common/relation'
import props from './props'
import {toPx, base64ToPath, pathToBase64, isBase64, sleep, getImageInfo}from './utils';
// #ifndef APP-NVUE
import { compareVersion } from './utils';
import Painter from './painter'
// import Painter from '@lime/'
const nvue = {}
// #endif
// #ifdef APP-NVUE
import nvue from './nvue'
// #endif
export default {
name: 'lime-painter',
mixins: [props, parent('painter'), nvue],
data() {
return {
// #ifdef MP-WEIXIN || MP-TOUTIAO || MP-ALIPAY
use2dCanvas: true,
// #endif
// #ifndef MP-WEIXIN || MP-TOUTIAO || MP-ALIPAY
use2dCanvas: false,
// #endif
canvasHeight: 150,
canvasWidth: null,
parentWidth: 0,
inited: false,
progress: 0,
firstRender: 0,
done: false
};
},
computed: {
styles() {
return `${this.size}${this.customStyle||''};`
},
canvasId() {
return `l-painter${this._uid || this._.uid}`
},
size() {
if (this.boardWidth && this.boardHeight) {
return `width:${this.boardWidth}px; height: ${this.boardHeight}px;`;
}
},
dpr() {
return this.pixelRatio || uni.getSystemInfoSync().pixelRatio;
},
boardWidth() {
const {width = 0} = (this.elements && this.elements.css) || this.elements || this
const w = toPx(width||this.width)
return w || Math.max(w, toPx(this.canvasWidth));
},
boardHeight() {
const {height = 0} = (this.elements && this.elements.css) || this.elements || this
const h = toPx(height||this.height)
return h || Math.max(h, toPx(this.canvasHeight));
},
hasBoard() {
return this.board && Object.keys(this.board).length
},
elements() {
return this.hasBoard ? this.board : JSON.parse(JSON.stringify(this.el))
}
},
watch: {
// #ifdef MP-WEIXIN || MP-ALIPAY
size(v) {
// #ifdef MP-WEIXIN
if (this.use2dCanvas) {
this.inited = false;
}
// #endif
// #ifdef MP-ALIPAY
this.inited = false;
// #endif
},
// #endif
},
created() {
const { SDKVersion, version, platform } = uni.getSystemInfoSync();
// #ifdef MP-WEIXIN
this.use2dCanvas = this.type === '2d' && compareVersion(SDKVersion, '2.9.2') >= 0 && !this.isPC;
// #endif
// #ifdef MP-TOUTIAO
this.use2dCanvas = this.type === '2d' && compareVersion(SDKVersion, '1.78.0') >= 0;
// #endif
// #ifdef MP-ALIPAY
this.use2dCanvas = this.type === '2d' && compareVersion(my.SDKVersion, '2.7.15') >= 0;
// #endif
},
async mounted() {
await sleep(30)
await this.getParentWeith()
this.$nextTick(() => {
setTimeout(() => {
this.$watch('elements', this.watchRender, {
deep: true,
immediate: true
});
}, 30)
})
},
methods: {
async watchRender(val, old) {
if (!val || !val.views || (!this.firstRender ? !val.views.length : !this.firstRender) || !Object.keys(val).length || JSON.stringify(val) == JSON.stringify(old)) return;
this.firstRender = 1
clearTimeout(this.rendertimer)
this.rendertimer = setTimeout(() => {
this.render(val);
}, this.beforeDelay)
},
async setFilePath(path, param) {
let filePath = path
const {pathType = this.pathType} = param || this
if (pathType == 'base64' && !isBase64(path)) {
filePath = await pathToBase64(path)
} else if (pathType == 'url' && isBase64(path)) {
filePath = await base64ToPath(path)
}
if (param && param.isEmit) {
this.$emit('success', filePath);
}
return filePath
},
async getSize(args) {
const {width} = args.css || args
const {height} = args.css || args
if (!this.size) {
if (width || height) {
this.canvasWidth = width || this.canvasWidth
this.canvasHeight = height || this.canvasHeight
await sleep(30);
} else {
await this.getParentWeith()
}
}
},
canvasToTempFilePathSync(args) {
this.stopWatch = this.$watch('done', (v) => {
if (v) {
this.canvasToTempFilePath(args)
this.stopWatch && this.stopWatch()
}
}, {
immediate: true
})
},
// #ifndef APP-NVUE
getParentWeith() {
return new Promise(resolve => {
uni.createSelectorQuery()
.in(this)
.select(`.lime-painter`)
.boundingClientRect()
.exec(res => {
const {width, height} = res[0]||{}
this.parentWidth = Math.ceil(width||0)
this.canvasWidth = this.parentWidth || 300
this.canvasHeight = height || this.canvasHeight||150
resolve(res[0])
})
})
},
async render(args = {}) {
if(!Object.keys(args).length) {
return console.error('空对象')
}
this.progress = 0
this.done = false
await this.getSize(args)
const ctx = await this.getContext();
let {
use2dCanvas,
boardWidth,
boardHeight,
canvas,
afterDelay
} = this;
if (use2dCanvas && !canvas) {
return Promise.reject(new Error('render: fail canvas has not been created'));
}
this.boundary = {
top: 0,
left: 0,
width: boardWidth,
height: boardHeight
};
this.painter = null
if (!this.painter) {
const {width} = args.css || args
const {height} = args.css || args
if(!width && this.parentWidth) {
Object.assign(args, {width: this.parentWidth})
}
const param = {
context: ctx,
canvas,
width: boardWidth,
height: boardHeight,
pixelRatio: this.dpr,
useCORS: this.useCORS,
createImage: getImageInfo.bind(this),
listen: {
onProgress: (v) => {
this.progress = v
this.$emit('progress', v)
},
onEffectFail: (err) => {
this.$emit('faill', err)
}
}
}
this.painter = new Painter(param)
}
// vue3 赋值给data会引起图片无法绘制
const { width, height } = await this.painter.source(JSON.parse(JSON.stringify(args)))
this.boundary.height = this.canvasHeight = height
this.boundary.width = this.canvasWidth = width
await sleep(this.sleep);
// 可能会因为尺寸改变影响绘制上下文
this.painter.setContext(this.ctx)
await this.painter.render()
await new Promise(resolve => this.$nextTick(resolve));
if (!use2dCanvas) {
await this.canvasDraw();
}
if (afterDelay && use2dCanvas) {
await sleep(afterDelay);
}
this.$emit('done');
this.done = true
if (this.isCanvasToTempFilePath) {
this.canvasToTempFilePath()
.then(res => {
this.$emit('success', res.tempFilePath)
})
.catch(err => {
this.$emit('fail', new Error(JSON.stringify(err)));
});
}
return Promise.resolve({
ctx,
draw: this.painter,
node: this.node
});
},
canvasDraw(flag = false) {
return new Promise((resolve, reject) => this.ctx.draw(flag, () => setTimeout(() => resolve(), this
.afterDelay)));
},
async getContext() {
if (!this.canvasWidth) {
this.$emit('fail', 'painter no size')
console.error('painter no size: 请给画板或父级设置尺寸')
return Promise.reject();
}
if (this.ctx && this.inited) {
return Promise.resolve(this.ctx);
}
const { type, use2dCanvas, dpr, boardWidth, boardHeight } = this;
const _getContext = () => {
return new Promise(resolve => {
uni.createSelectorQuery()
.in(this)
.select(`#${this.canvasId}`)
.boundingClientRect()
.exec(res => {
if (res) {
const ctx = uni.createCanvasContext(this.canvasId, this);
if (!this.inited) {
this.inited = true;
this.use2dCanvas = false;
this.canvas = res;
}
// #ifdef MP-ALIPAY
ctx.scale(dpr, dpr);
// #endif
this.ctx = ctx
resolve(this.ctx);
}
});
});
};
if (!use2dCanvas) {
return _getContext();
}
return new Promise(resolve => {
uni.createSelectorQuery()
.in(this)
.select(`#${this.canvasId}`)
.node()
.exec(res => {
let {node: canvas} = res[0];
if (!canvas) {
this.use2dCanvas = false;
resolve(this.getContext());
}
const ctx = canvas.getContext(type);
if (!this.inited) {
this.inited = true;
this.use2dCanvas = true;
this.canvas = canvas;
}
this.ctx = ctx
resolve(this.ctx);
});
});
},
canvasToTempFilePath(args = {}) {
return new Promise(async (resolve, reject) => {
const { use2dCanvas, canvasId, dpr, fileType, quality } = this;
const success = async (res) => {
try {
const tempFilePath = await this.setFilePath(res.tempFilePath || res)
resolve(Object.assign(res, {tempFilePath}))
} catch (e) {
this.$emit('fail', e)
}
}
let { top: y = 0, left: x = 0, width, height } = this.boundary || this;
let destWidth = width * dpr;
let destHeight = height * dpr;
// #ifdef MP-ALIPAY
width = destWidth;
height = destHeight;
// #endif
const copyArgs = Object.assign({
x,
y,
width,
height,
destWidth,
destHeight,
canvasId,
fileType,
quality,
success,
fail: reject
}, args);
if (use2dCanvas) {
try{
// #ifndef MP-ALIPAY
if(!args.pathType && !this.pathType) {args.pathType = 'url'}
const tempFilePath = await this.setFilePath(this.canvas.toDataURL(`image/${args.fileType||fileType}`.replace(/pg/, 'peg'), args.quality||quality), args)
args.success && args.success({tempFilePath})
resolve({tempFilePath})
// #endif
// #ifdef MP-ALIPAY
this.canvas.toTempFilePath(copyArgs)
// #endif
}catch(e){
args.fail && args.fail(e)
reject(e)
}
} else {
// #ifdef MP-ALIPAY
uni.canvasToTempFilePath(copyArgs);
// #endif
// #ifndef MP-ALIPAY
uni.canvasToTempFilePath(copyArgs, this);
// #endif
}
})
}
// #endif
}
};
</script>
<style>
.lime-painter,
.lime-painter__canvas {
// #ifndef APP-NVUE
width: 100%;
// #endif
// #ifdef APP-NVUE
flex: 1;
// #endif
}
</style>

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// #ifdef APP-NVUE
import { sleep, getImageInfo, isBase64, useNvue, networkReg } from './utils';
const dom = weex.requireModule('dom')
import {version } from '../../package.json'
export default {
data() {
return {
tempFilePath: [],
isInitFile: false,
osName: uni.getSystemInfoSync().osName
}
},
created() {
// if (this.hybrid) return
// useNvue('_doc/uni_modules/lime-painter/', version, this.timeout).then(res => {
// this.isInitFile = true
// })
},
methods: {
getParentWeith() {
return new Promise(resolve => {
dom.getComponentRect(this.$refs.limepainter, (res) => {
this.parentWidth = Math.ceil(res.size.width)
this.canvasWidth = this.canvasWidth || this.parentWidth ||300
this.canvasHeight = res.size.height || this.canvasHeight||150
resolve(res.size)
})
})
},
onPageFinish() {
this.webview = this.$refs.webview
this.webview.evalJS(`init(${this.dpr})`)
},
onMessage(e) {
const res = e.detail.data[0] || null;
if (res.event) {
if (res.event == 'inited') {
this.inited = true
}
if(res.event == 'fail'){
this.$emit('fail', res)
}
if (res.event == 'layoutChange') {
const data = typeof res.data == 'string' ? JSON.parse(res.data) : res.data
this.canvasWidth = Math.ceil(data.width);
this.canvasHeight = Math.ceil(data.height);
}
if (res.event == 'progressChange') {
this.progress = res.data * 1
}
if (res.event == 'file') {
this.tempFilePath.push(res.data)
if (this.tempFilePath.length > 7) {
this.tempFilePath.shift()
}
return
}
if (res.event == 'success') {
if (res.data) {
this.tempFilePath.push(res.data)
if (this.tempFilePath.length > 8) {
this.tempFilePath.shift()
}
if (this.isCanvasToTempFilePath) {
this.setFilePath(this.tempFilePath.join(''), {isEmit:true})
}
} else {
this.$emit('fail', 'canvas no data')
}
return
}
this.$emit(res.event, JSON.parse(res.data));
} else if (res.file) {
this.file = res.data;
} else{
console.info(res[0])
}
},
getWebViewInited() {
if (this.inited) return Promise.resolve(this.inited);
return new Promise((resolve) => {
this.$watch(
'inited',
async val => {
if (val) {
resolve(val)
}
}, {
immediate: true
}
);
})
},
getTempFilePath() {
if (this.tempFilePath.length == 8) return Promise.resolve(this.tempFilePath)
return new Promise((resolve) => {
this.$watch(
'tempFilePath',
async val => {
if (val.length == 8) {
resolve(val.join(''))
}
}
);
})
},
getWebViewDone() {
if (this.progress == 1) return Promise.resolve(this.progress);
return new Promise((resolve) => {
this.$watch(
'progress',
async val => {
if (val == 1) {
this.$emit('done')
this.done = true
resolve(val)
}
}, {
immediate: true
}
);
})
},
async render(args) {
try {
await this.getSize(args)
const {width} = args.css || args
if(!width && this.parentWidth) {
Object.assign(args, {width: this.parentWidth})
}
const newNode = await this.calcImage(args);
await this.getWebViewInited()
this.webview.evalJS(`source(${JSON.stringify(newNode)})`)
await this.getWebViewDone()
await sleep(this.afterDelay)
if (this.isCanvasToTempFilePath) {
const params = {
fileType: this.fileType,
quality: this.quality
}
this.webview.evalJS(`save(${JSON.stringify(params)})`)
}
return Promise.resolve()
} catch (e) {
this.$emit('fail', e)
}
},
getfile(e){
let url = plus.io.convertLocalFileSystemURL( e )
return new Promise((resolve,reject)=>{
plus.io.resolveLocalFileSystemURL(url, entry => {
var reader = null;
entry.file( file => {
reader = new plus.io.FileReader();
reader.onloadend = ( read )=> {
resolve(read.target.result)
};
reader.readAsDataURL( file );
}, function ( error ) {
alert( error.message );
} );
},err=>{
resolve(e)
})
})
},
async calcImage(args) {
let node = JSON.parse(JSON.stringify(args))
const urlReg = /url\((.+)\)/
const {backgroundImage} = node.css||{}
const isBG = backgroundImage && urlReg.exec(backgroundImage)[1]
const url = node.url || node.src || isBG
if(['text', 'qrcode'].includes(node.type)) {
return node
}
if ((node.type === "image" || isBG) && url && !isBase64(url) && (this.osName == 'ios' ? true : !networkReg.test(url))) {
let {path} = await getImageInfo(url)
if(this.osName == 'ios') {
path = await this.getfile(path)
}
if (isBG) {
node.css.backgroundImage = `url(${path})`
} else {
node.src = path
}
} else if (node.views && node.views.length) {
for (let i = 0; i < node.views.length; i++) {
node.views[i] = await this.calcImage(node.views[i])
}
}
return node
},
async canvasToTempFilePath(args = {}) {
if (!this.inited) {
return this.$emit('fail', 'no init')
}
this.tempFilePath = []
if (args.fileType == 'jpg') {
args.fileType = 'jpeg'
}
this.webview.evalJS(`save(${JSON.stringify(args)})`)
try {
let tempFilePath = await this.getTempFilePath()
tempFilePath = await this.setFilePath(tempFilePath)
args.success({
errMsg: "canvasToTempFilePath:ok",
tempFilePath
})
} catch (e) {
args.fail({
error: e
})
}
}
}
}
// #endif

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export default {
props: {
board: Object,
pathType: String, // 'base64'、'url'
fileType: {
type: String,
default: 'png'
},
quality: {
type: Number,
default: 1
},
css: [String, Object],
// styles: [String, Object],
width: [Number, String],
height: [Number, String],
pixelRatio: Number,
customStyle: String,
isCanvasToTempFilePath: Boolean,
// useCanvasToTempFilePath: Boolean,
sleep: {
type: Number,
default: 1000 / 30
},
beforeDelay: {
type: Number,
default: 100
},
afterDelay: {
type: Number,
default: 100
},
// #ifdef MP-WEIXIN || MP-TOUTIAO || MP-ALIPAY
type: {
type: String,
default: '2d'
},
// #endif
// #ifdef APP-NVUE
hybrid: Boolean,
timeout: {
type: Number,
default: 2000
},
// #endif
// #ifdef H5
useCORS: Boolean
// #endif
}
}

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export const networkReg = /^(http|\/\/)/;
export const isBase64 = (path) => /^data:image\/(\w+);base64/.test(path);
export function sleep(delay) {
return new Promise(resolve => setTimeout(resolve, delay))
}
const isDev = ['devtools'].includes(uni.getSystemInfoSync().platform)
// 缓存图片
let cache = {}
export function isNumber(value) {
return /^-?\d+(\.\d+)?$/.test(value);
}
export function toPx(value, baseSize, isDecimal = false) {
// 如果是数字
if (typeof value === 'number') {
return value
}
// 如果是字符串数字
if (isNumber(value)) {
return value * 1
}
// 如果有单位
if (typeof value === 'string') {
const reg = /^-?([0-9]+)?([.]{1}[0-9]+){0,1}(em|rpx|px|%)$/g
const results = reg.exec(value);
if (!value || !results) {
return 0;
}
const unit = results[3];
value = parseFloat(value);
let res = 0;
if (unit === 'rpx') {
res = uni.upx2px(value);
} else if (unit === 'px') {
res = value * 1;
} else if (unit === '%') {
res = value * toPx(baseSize) / 100;
} else if (unit === 'em') {
res = value * toPx(baseSize || 14);
}
return isDecimal ? res.toFixed(2) * 1 : Math.round(res);
}
return 0
}
// 计算版本
export function compareVersion(v1, v2) {
v1 = v1.split('.')
v2 = v2.split('.')
const len = Math.max(v1.length, v2.length)
while (v1.length < len) {
v1.push('0')
}
while (v2.length < len) {
v2.push('0')
}
for (let i = 0; i < len; i++) {
const num1 = parseInt(v1[i], 10)
const num2 = parseInt(v2[i], 10)
if (num1 > num2) {
return 1
} else if (num1 < num2) {
return -1
}
}
return 0
}
// #ifdef MP
export const prefix = () => {
// #ifdef MP-TOUTIAO
return tt
// #endif
// #ifdef MP-WEIXIN
return wx
// #endif
// #ifdef MP-BAIDU
return swan
// #endif
// #ifdef MP-ALIPAY
return my
// #endif
// #ifdef MP-QQ
return qq
// #endif
// #ifdef MP-360
return qh
// #endif
}
// #endif
const base64ToArrayBuffer = (data) => {
// #ifndef MP-WEIXIN || APP-PLUS
/**
* Base64Binary.decode(base64_string);
* Base64Binary.decodeArrayBuffer(base64_string);
*/
const Base64Binary = {
_keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
/* will return a Uint8Array type */
decodeArrayBuffer(input) {
const bytes = (input.length / 4) * 3;
const ab = new ArrayBuffer(bytes);
this.decode(input, ab);
return ab;
},
removePaddingChars(input) {
const lkey = this._keyStr.indexOf(input.charAt(input.length - 1));
if (lkey == 64) {
return input.substring(0, input.length - 1);
}
return input;
},
decode(input, arrayBuffer) {
//get last chars to see if are valid
input = this.removePaddingChars(input);
input = this.removePaddingChars(input);
const bytes = parseInt((input.length / 4) * 3, 10);
let uarray;
let chr1, chr2, chr3;
let enc1, enc2, enc3, enc4;
let i = 0;
let j = 0;
if (arrayBuffer)
uarray = new Uint8Array(arrayBuffer);
else
uarray = new Uint8Array(bytes);
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
for (i = 0; i < bytes; i += 3) {
//get the 3 octects in 4 ascii chars
enc1 = this._keyStr.indexOf(input.charAt(j++));
enc2 = this._keyStr.indexOf(input.charAt(j++));
enc3 = this._keyStr.indexOf(input.charAt(j++));
enc4 = this._keyStr.indexOf(input.charAt(j++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
uarray[i] = chr1;
if (enc3 != 64) uarray[i + 1] = chr2;
if (enc4 != 64) uarray[i + 2] = chr3;
}
return uarray;
}
}
return Base64Binary.decodeArrayBuffer(data)
// #endif
// #ifdef MP-WEIXIN || APP-PLUS
return uni.base64ToArrayBuffer(data)
// #endif
}
/**
* base64转路径
* @param {Object} base64
*/
export function base64ToPath(base64) {
const [, format] = /^data:image\/(\w+);base64,/.exec(base64) || [];
return new Promise((resolve, reject) => {
// #ifdef MP
const fs = uni.getFileSystemManager()
//自定义文件名
if (!format) {
reject(new Error('ERROR_BASE64SRC_PARSE'))
}
const time = new Date().getTime();
let pre = prefix()
const filePath = `${pre.env.USER_DATA_PATH}/${time}.${format}`
//let buffer = base64ToArrayBuffer(bodyData)
fs.writeFile({
filePath,
data: base64.split(',')[1], //base64.replace(/^data:\S+\/\S+;base64,/, ''),
encoding: 'base64',
// data: buffer,
// encoding: 'binary',
success() {
resolve(filePath)
},
fail(err) {
reject(err)
}
})
// #endif
// #ifdef H5
// mime类型
let mimeString = base64.split(',')[0].split(':')[1].split(';')[0];
//base64 解码
let byteString = atob(base64.split(',')[1]);
//创建缓冲数组
let arrayBuffer = new ArrayBuffer(byteString.length);
//创建视图
let intArray = new Uint8Array(arrayBuffer);
for (let i = 0; i < byteString.length; i++) {
intArray[i] = byteString.charCodeAt(i);
}
resolve(URL.createObjectURL(new Blob([intArray], {
type: mimeString
})))
// #endif
// #ifdef APP-PLUS
const bitmap = new plus.nativeObj.Bitmap('bitmap' + Date.now())
bitmap.loadBase64Data(base64, () => {
if (!format) {
reject(new Error('ERROR_BASE64SRC_PARSE'))
}
const time = new Date().getTime();
const filePath = `_doc/uniapp_temp/${time}.${format}`
bitmap.save(filePath, {},
() => {
bitmap.clear()
resolve(filePath)
},
(error) => {
bitmap.clear()
reject(error)
})
}, (error) => {
bitmap.clear()
reject(error)
})
// #endif
})
}
/**
* 路径转base64
* @param {Object} string
*/
export function pathToBase64(path) {
if (/^data:/.test(path)) return path
return new Promise((resolve, reject) => {
// #ifdef H5
let image = new Image();
image.setAttribute("crossOrigin", 'Anonymous');
image.onload = function() {
let canvas = document.createElement('canvas');
canvas.width = this.naturalWidth;
canvas.height = this.naturalHeight;
canvas.getContext('2d').drawImage(image, 0, 0);
let result = canvas.toDataURL('image/png')
resolve(result);
canvas.height = canvas.width = 0
}
image.src = path + '?v=' + Math.random()
image.onerror = (error) => {
reject(error);
};
// #endif
// #ifdef MP
if (uni.canIUse('getFileSystemManager')) {
uni.getFileSystemManager().readFile({
filePath: path,
encoding: 'base64',
success: (res) => {
resolve('data:image/png;base64,' + res.data)
},
fail: (error) => {
reject(error)
}
})
}
// #endif
// #ifdef APP-PLUS
plus.io.resolveLocalFileSystemURL(getLocalFilePath(path), (entry) => {
entry.file((file) => {
const fileReader = new plus.io.FileReader()
fileReader.onload = (data) => {
resolve(data.target.result)
}
fileReader.onerror = (error) => {
reject(error)
}
fileReader.readAsDataURL(file)
}, reject)
}, reject)
// #endif
})
}
export function getImageInfo(path, useCORS) {
return new Promise(async (resolve, reject) => {
let src = path
if (cache[path] && cache[path].errMsg) {
resolve(cache[path])
} else {
try {
// if (!isBase64 && PLATFORM == UNI_PLATFORM.PLUS && !/^\/?(static|_doc)\//.test(src)) {
// src = await downloadFile(path) as string
// } else
// #ifdef MP || APP-PLUS
if (isBase64(path)) {
src = await base64ToPath(path)
}
// #endif
// #ifdef H5
if(useCORS) {
src = await pathToBase64(path)
}
// #endif
} catch (error) {
reject({
...error,
src
})
}
uni.getImageInfo({
src,
success: (image) => {
const localReg = /^\.|^\/(?=[^\/])/;
// #ifdef MP-WEIXIN || MP-BAIDU || MP-QQ || MP-TOUTIAO
image.path = localReg.test(src) ? `/${image.path}` : image.path;
// #endif
// #ifdef H5
image.path = image.path.replace(/^\./, window.location.origin)
// #endif
if(this.canvas.createImage) {
const img = this.canvas.createImage()
img.src = image.path
img.onload = function() {
image.path = img
cache[path] = image
resolve(cache[path])
}
img.onerror = function(err) {
reject({err,path})
}
} else if (isDev) {
resolve(image)
} else {
cache[path] = image
resolve(cache[path])
}
},
fail(err) {
console.error({err, path})
reject({err,path})
}
})
}
})
}
export function downloadFile(url) {
if (!url) return Promise.reject({
err: 'no url'
})
return new Promise((resolve, reject) => {
if (cache[url]) {
return reject()
}
cache[url] = 1
uni.downloadFile({
url,
success(res) {
resolve(res)
},
fail(err) {
reject(err)
}
})
})
}
// #ifdef APP-PLUS
const getLocalFilePath = (path) => {
if (path.indexOf('_www') === 0 || path.indexOf('_doc') === 0 || path.indexOf('_documents') === 0 || path
.indexOf('_downloads') === 0) {
return path
}
if (path.indexOf('file://') === 0) {
return path
}
if (path.indexOf('/storage/emulated/0/') === 0) {
return path
}
if (path.indexOf('/') === 0) {
const localFilePath = plus.io.convertAbsoluteFileSystem(path)
if (localFilePath !== path) {
return localFilePath
} else {
path = path.substr(1)
}
}
return '_www/' + path
}
const getFile = (url) => {
return new Promise((resolve, rejcet) => {
plus.io.resolveLocalFileSystemURL(url, resolve, (err) => {
resolve(false)
})
})
}
const createFile = ({
fs,
url,
target,
name
}) => {
return new Promise((resolve, reject) => {
plus.io.resolveLocalFileSystemURL(url, res1 => {
fs.root.getDirectory(target, {
create: true
}, fileEntry => {
const success = () => {
res1.remove()
resolve()
}
getFile(target + name).then(res => {
if (res) {
res.remove((res2) => {
res1.moveTo(fileEntry, name, success, reject)
})
}
res1.moveTo(fileEntry, name, success, reject)
})
})
}, reject)
})
}
export function useNvue(target, version, timeout) {
return new Promise((resolve, reject) => {
plus.io.requestFileSystem(plus.io.PRIVATE_DOC, async (fs) => {
try {
cache['lime-painter'] = 0
let names = ['uni.webview.1.5.3.js', 'painter.js', 'index.html']
let urls = ['https://gitee.com/dcloud/uni-app/raw/dev/dist/',
'https://static-6d65bd90-8508-4d6c-abbc-a4ef5c8e49e7.bspapp.com/lime-painter/'
]
const oldVersion = plus.storage.getItem('lime-painter')
const isFile = await getFile(`${target}${names[1]}`)
if (isFile && oldVersion && compareVersion(oldVersion, version) >= 0) {
resolve()
} else {
for (var i = 0; i < names.length; i++) {
const name = names[i]
const file = await downloadFile(urls[i >= 1 ? 1 : 0] + name)
await createFile({
fs,
url: file.tempFilePath,
target,
name: name.includes('uni.webview') ? 'uni.webview.js' : name
})
}
plus.storage.setItem('lime-painter', version)
cache['lime-painter'] = version
resolve()
}
} catch (e) {
let index = parseInt(timeout / 20)
while (!cache['lime-painter'] && index) {
await sleep(20)
index--
}
if (cache['lime-painter']) {
resolve()
} else {
reject(e)
}
}
}, reject)
})
}
// #endif

View File

@@ -0,0 +1,2 @@
<template>
</template>

View File

@@ -0,0 +1,95 @@
{
"id": "lime-painter",
"displayName": "海报画板",
"version": "1.9.3.5",
"description": "一款canvas海报组件更优雅的海报生成方案",
"keywords": [
"海报",
"canvas",
"生成海报",
"生成二维码",
"JSON"
],
"repository": "https://gitee.com/liangei/lime-painter",
"engines": {
"HBuilderX": "^3.4.14"
},
"dcloudext": {
"category": [
"前端组件",
"通用组件"
],
"sale": {
"regular": {
"price": "0.00"
},
"sourcecode": {
"price": "0.00"
}
},
"contact": {
"qq": "305716444"
},
"declaration": {
"ads": "无",
"data": "无",
"permissions": "无"
},
"npmurl": ""
},
"uni_modules": {
"dependencies": [],
"encrypt": [],
"platforms": {
"cloud": {
"tcb": "y",
"aliyun": "y"
},
"client": {
"App": {
"app-vue": "y",
"app-nvue": "y"
},
"H5-mobile": {
"Safari": "y",
"Android Browser": "y",
"微信浏览器(Android)": "y",
"QQ浏览器(Android)": "y"
},
"H5-pc": {
"Chrome": "y",
"IE": "u",
"Edge": "u",
"Firefox": "u",
"Safari": "y"
},
"小程序": {
"微信": "y",
"阿里": "y",
"百度": "y",
"字节跳动": "y",
"QQ": "y",
"钉钉": "u",
"快手": "u",
"飞书": "u",
"京东": "u"
},
"快应用": {
"华为": "u",
"联盟": "u"
},
"Vue": {
"vue2": "y",
"vue3": "y"
}
}
}
},
"name": "lime-painter",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC"
}

View File

@@ -0,0 +1,911 @@
# Painter 画板 测试版
> uniapp 海报画板,更优雅的海报生成方案
> [查看更多 站点 1](https://limeui.qcoon.cn/#/painter)
> [查看更多 站点 2](http://liangei.gitee.io/limeui/#/painter)
> Q 群806744170
## 平台兼容
| H5 | 微信小程序 | 支付宝小程序 | 百度小程序 | 头条小程序 | QQ 小程序 | App |
| --- | ---------- | ------------ | ---------- | ---------- | --------- | --- |
| √ | √ | √ | 未测 | √ | √ | √ |
## 安装
在市场导入**[海报画板](https://ext.dcloud.net.cn/plugin?id=2389)uni_modules**版本的即可,无需`import`
## 代码演示
### 基本用法
- 插件提供 JSON 及 XML 的方式绘制海报
- 参考 css 块状流布局模拟 css schema。
#### 方式一 XML
- 提供`l-painter-view``l-painter-text``l-painter-image``l-painter-qrcode`四种类型组件
- 通过 `css` 属性绘制样式,与 style 使用方式保持一致。
```html
<l-painter>
//如果使用XML出现顺序错乱可使用`template` 等所有变量完成再显示
<template v-if="show">
<l-painter-view
css="background: #07c160; height: 120rpx; width: 120rpx; display: inline-block"
></l-painter-view>
<l-painter-view
css="background: #1989fa; height: 120rpx; width: 120rpx; border-top-right-radius: 60rpx; border-bottom-left-radius: 60rpx; display: inline-block; margin: 0 30rpx;"
></l-painter-view>
<l-painter-view
css="background: #ff9d00; height: 120rpx; width: 120rpx; border-radius: 50%; display: inline-block"
></l-painter-view>
<template>
</l-painter>
```
#### 方式二 JSON
- 在 json 里四种类型组件的`type``view``text``image``qrcode`
- 通过 `board` 设置海报所需的 JSON 数据进行绘制或`ref`获取组件实例调用组件内的`render(json)`
- 所有类型的 schema 都具有`css`字段css 的 key 值使用**驼峰**如:`lineHeight`
```html
<l-painter :board="poster"/>
```
```js
data() {
return {
poster: {
css: {
// 根节点若无尺寸,自动获取父级节点
width: '750rpx'
},
views: [
{
css: {
background: "#07c160",
height: "120rpx",
width: "120rpx",
display: "inline-block"
},
type: "view"
},
{
css: {
background: "#1989fa",
height: "120rpx",
width: "120rpx",
borderTopRightRadius: "60rpx",
borderBottomLeftRadius: "60rpx",
display: "inline-block",
margin: "0 30rpx"
},
views: [],
type: "view"
},
{
css: {
background: "#ff9d00",
height: "120rpx",
width: "120rpx",
borderRadius: "50%",
display: "inline-block"
},
views: [],
type: "view"
},
]
}
}
}
```
### View 容器
- 类似于 `div` 可以嵌套承载更多的 view、text、imageqrcode 共同构建一颗完整的节点树
- 在 JSON 里具有 `views` 的数组字段,用于嵌套承载节点。
#### 方式一 XML
```html
<l-painter>
<l-painter-view css="background: #f0f0f0; padding-top: 100rpx;">
<l-painter-view
css="background: #d9d9d9; width: 33.33%; height: 100rpx; display: inline-block"
></l-painter-view>
<l-painter-view
css="background: #bfbfbf; width: 66.66%; height: 100rpx; display: inline-block"
></l-painter-view>
</l-painter-view>
</l-painter>
```
#### 方式二 JSON
```js
{
css: {},
views: [
{
type: 'view',
css: {
background: '#f0f0f0',
paddingTop: '100rpx'
},
views: [
{
type: 'view',
css: {
background: '#d9d9d9',
width: '33.33%',
height: '100rpx',
display: 'inline-block'
}
},
{
type: 'view',
css: {
background: '#bfbfbf',
width: '66.66%',
height: '100rpx',
display: 'inline-block'
}
}
],
}
]
}
```
### Text 文本
- 通过 `text` 属性填写文本内容。
- 支持`\n`换行符
- 支持省略号,使用 css 的`line-clamp`设置行数,当文字内容超过会显示省略号。
- 支持`text-decoration`
#### 方式一 XML
```html
<l-painter>
<l-painter-view css="background: #e0e2db; padding: 30rpx; color: #222a29">
<l-painter-text
text="登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼"
/>
<l-painter-text
text="登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼"
css="text-align:center; padding-top: 20rpx; text-decoration: line-through "
/>
<l-painter-text
text="登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼"
css="text-align:right; padding-top: 20rpx"
/>
<l-painter-text
text="水调歌头\n明月几时有把酒问青天。不知天上宫阙今夕是何年。我欲乘风归去又恐琼楼玉宇高处不胜寒。起舞弄清影何似在人间。"
css="line-clamp: 3; padding-top: 20rpx; background: linear-gradient(,#ff971b 0%, #ff5000 100%); background-clip: text"
/>
</l-painter-view>
</l-painter>
```
#### 方式二 JSON
```js
// 基础用法
{
type: 'text',
text: '登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼',
},
{
type: 'text',
text: '登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼',
css: {
// 设置居中对齐
textAlign: 'center',
// 设置中划线
textDecoration: 'line-through'
}
},
{
type: 'text',
text: '登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼',
css: {
// 设置右对齐
textAlign: 'right',
}
},
{
type: 'text',
text: '登鹳雀楼\n白日依山尽黄河入海流\n欲穷千里目更上一层楼',
css: {
// 设置行数,超出显示省略号
lineClamp: 3,
// 渐变文字
background: 'linear-gradient(,#ff971b 0%, #1989fa 100%)',
backgroundClip: 'text'
}
}
```
### Image 图片
- 通过 `src` 属性填写图片路径。
- 图片路径支持:网络图片,本地 static 里的图片路径,缓存路径
- 通过 `css``object-fit`属性可以设置图片的填充方式,可选值见下方 CSS 表格。
- 通过 `css``object-position`配合 `object-fit` 可以设置图片的对齐方式,类似于`background-position`,详情见下方 CSS 表格。
- 使用网络图片时:小程序需要去公众平台配置 [downloadFile](https://mp.weixin.qq.com/) 域名
- 使用网络图片时:**H5 和 Nvue 需要决跨域问题**
#### 方式一 XML
```html
<l-painter>
<!-- 基础用法 -->
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="width: 200rpx; height: 200rpx"
/>
<!-- 填充方式 -->
<!-- css object-fit 设置 填充方式 见下方表格-->
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="width: 200rpx; height: 200rpx; object-fit: contain; background: #eee"
/>
<!-- css object-position 设置 图片的对齐方式-->
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="width: 200rpx; height: 200rpx; object-fit: contain; object-position: 50% 50%; background: #eee"
/>
</l-painter>
```
#### 方式二 JSON
```js
// 基础用法
{
type: 'image',
src: 'https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg',
css: {
width: '200rpx',
height: '200rpx'
}
},
// 填充方式
// css objectFit 设置 填充方式 见下方表格
{
type: 'image',
src: 'https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg',
css: {
width: '200rpx',
height: '200rpx',
objectFit: 'contain'
}
},
// css objectPosition 设置 图片的对齐方式
{
type: 'image',
src: 'https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg',
css: {
width: '200rpx',
height: '200rpx',
objectFit: 'contain',
objectPosition: '50% 50%'
}
}
```
### Qrcode 二维码
- 通过`text`属性填写需要生成二维码的文本。
- 通过 `css` 里的 `color` 可设置生成码点的颜色。
- 通过 `css` 里的 `background`可设置背景色。
- 通过 `css `里的 `width``height`设置尺寸。
#### 方式一 XML
```html
<l-painter>
<l-painter-qrcode
text="limeui.qcoon.cn"
css="width: 200rpx; height: 200rpx"
/>
</l-painter>
```
#### 方式二 JSON
```js
{
type: 'qrcode',
text: 'limeui.qcoon.cn',
css: {
width: '200rpx',
height: '200rpx',
}
}
```
### 生成图片
- 1、通过设置`isCanvasToTempFilePath`自动生成图片并在 `@success` 事件里接收海报临时路径
- 2、通过调用内部方法生成图片
```html
<l-painter ref="painter">...code</l-painter>
```
```js
this.$refs.painter.canvasToTempFilePathSync({
fileType: "jpg",
// 如果返回的是base64是无法使用 saveImageToPhotosAlbum需要设置 pathType为url
pathType: 'url',
quality: 1,
success: (res) => {
console.log(res.tempFilePath);
// 非H5 保存到相册
// H5 提示用户长按图另存
uni.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: function () {
console.log('save success');
}
});
},
});
```
### 主动调用方式
- 通过获取组件实例内部的`render`函数 传递`JSON`即可
```html
<l-painter ref="painter" />
```
```js
// 渲染
this.$refs.painter.render(jsonSchema);
// 生成图片
this.$refs.painter.canvasToTempFilePathSync({
fileType: "jpg",
// 如果返回的是base64是无法使用 saveImageToPhotosAlbum需要设置 pathType为url
pathType: 'url',
quality: 1,
success: (res) => {
console.log(res.tempFilePath);
// 非H5 保存到相册
uni.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: function () {
console.log('save success');
}
});
},
});
```
### H5跨域
- 一般是需要后端或管理OSS资源的大佬处理
- 一般OSS的处理方式:
1、设置来源
```cmd
*
```
2、允许Methods
```html
GET
```
3、允许Headers
```html
access-control-allow-origin:*
```
4、最后如果还是不行,可试下给插件设置`useCORS`
```html
<l-painter useCORS>
```
### 海报示例
- 提供一份示例,只把插件当成生成图片的工具,非必要不要在弹窗里使用。
- 通过设置`isCanvasToTempFilePath`主动生成图片,再由 `@success` 事件接收海报临时路径
- 设置`custom-style="position: fixed; left: 200%"`样式把画板移到屏幕之外,达到隐藏画板的效果。
- **注意**:受平台影响海报画板最好不要隐藏,可能会无法生成图片。
#### 方式一 XML
```html
<image :src="path" mode="widthFix"></image>
<l-painter
isCanvasToTempFilePath
@success="path = $event"
custom-style="position: fixed; left: 200%"
css="width: 750rpx; padding-bottom: 40rpx; background: linear-gradient(,#ff971b 0%, #ff5000 100%)"
>
<l-painter-image
src="https://cdn.jsdelivr.net/gh/liangei/image@latest/avatar-1.jpeg"
css="margin-left: 40rpx; margin-top: 40rpx; width: 84rpx; height: 84rpx; border-radius: 50%;"
/>
<l-painter-view
css="margin-top: 40rpx; padding-left: 20rpx; display: inline-block"
>
<l-painter-text
text="隔壁老王"
css="display: block; padding-bottom: 10rpx; color: #fff; font-size: 32rpx; fontWeight: bold"
/>
<l-painter-text
text="为您挑选了一个好物"
css="color: rgba(255,255,255,.7); font-size: 24rpx"
/>
</l-painter-view>
<l-painter-view
css="margin-left: 40rpx; margin-top: 30rpx; padding: 32rpx; box-sizing: border-box; background: #fff; border-radius: 16rpx; width: 670rpx; box-shadow: 0 20rpx 58rpx rgba(0,0,0,.15)"
>
<l-painter-image
src="https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg"
css="object-fit: cover; object-position: 50% 50%; width: 606rpx; height: 606rpx; border-radius: 12rpx;"
/>
<l-painter-view
css="margin-top: 32rpx; color: #FF0000; font-weight: bold; font-size: 28rpx; line-height: 1em;"
>
<l-painter-text text="¥" css="vertical-align: bottom" />
<l-painter-text
text="39"
css="vertical-align: bottom; font-size: 58rpx"
/>
<l-painter-text text=".39" css="vertical-align: bottom" />
<l-painter-text
text="¥59.99"
css="vertical-align: bottom; padding-left: 10rpx; font-weight: normal; text-decoration: line-through; color: #999999"
/>
</l-painter-view>
<l-painter-view css="margin-top: 32rpx; font-size: 26rpx; color: #8c5400">
<l-painter-text text="自营" css="color: #212121; background: #ffb400;" />
<l-painter-text
text="30天最低价"
css="margin-left: 16rpx; background: #fff4d9; text-decoration: line-through;"
/>
<l-painter-text
text="满减优惠"
css="margin-left: 16rpx; background: #fff4d9"
/>
<l-painter-text
text="超高好评"
css="margin-left: 16rpx; background: #fff4d9"
/>
</l-painter-view>
<l-painter-view css="margin-top: 30rpx">
<l-painter-text
css="line-clamp: 2; color: #333333; line-height: 1.8em; font-size: 36rpx; width: 478rpx; padding-right:32rpx; box-sizing: border-box"
text="360儿童电话手表9X 智能语音问答定位支付手表 4G全网通20米游泳级防水视频通话拍照手表男女孩星空蓝"
></l-painter-text>
<l-painter-qrcode
css="width: 128rpx; height: 128rpx;"
text="limeui.qcoon.cn"
></l-painter-qrcode>
</l-painter-view>
</l-painter-view>
</l-painter>
```
```js
data() {
return {
path: ''
}
}
```
#### 方式二 JSON
```html
<image :src="path" mode="widthFix"></image>
<l-painter
:board="poster"
isCanvasToTempFilePath
@success="path = $event"
custom-style="position: fixed; left: 200%"
/>
```
```js
data() {
return {
path: '',
poster: {
css: {
width: "750rpx",
paddingBottom: "40rpx",
background: "linear-gradient(,#000 0%, #ff5000 100%)"
},
views: [
{
src: "https://fastly.jsdelivr.net/gh/liangei/image@latest/avatar-1.jpeg",
type: "image",
css: {
background: "#fff",
objectFit: "cover",
marginLeft: "40rpx",
marginTop: "40rpx",
width: "84rpx",
border: "2rpx solid #fff",
boxSizing: "border-box",
height: "84rpx",
borderRadius: "50%"
}
},
{
type: "view",
css: {
marginTop: "40rpx",
paddingLeft: "20rpx",
display: "inline-block"
},
views: [
{
text: "隔壁老王",
type: "text",
css: {
display: "block",
paddingBottom: "10rpx",
color: "#fff",
fontSize: "32rpx",
fontWeight: "bold"
}
},
{
text: "为您挑选了一个好物",
type: "text",
css: {
color: "rgba(255,255,255,.7)",
fontSize: "24rpx"
},
}
],
},
{
css: {
marginLeft: "40rpx",
marginTop: "30rpx",
padding: "32rpx",
boxSizing: "border-box",
background: "#fff",
borderRadius: "16rpx",
width: "670rpx",
boxShadow: "0 20rpx 58rpx rgba(0,0,0,.15)"
},
views: [
{
src: "https://m.360buyimg.com/babel/jfs/t1/196317/32/13733/288158/60f4ea39E6fb378ed/d69205b1a8ed3c97.jpg",
type: "image",
css: {
objectFit: "cover",
objectPosition: "50% 50%",
width: "606rpx",
height: "606rpx"
},
}, {
css: {
marginTop: "32rpx",
color: "#FF0000",
fontWeight: "bold",
fontSize: "28rpx",
lineHeight: "1em"
},
views: [{
text: "¥",
type: "text",
css: {
verticalAlign: "bottom"
},
}, {
text: "39",
type: "text",
css: {
verticalAlign: "bottom",
fontSize: "58rpx"
},
}, {
text: ".39",
type: "text",
css: {
verticalAlign: "bottom"
},
}, {
text: "¥59.99",
type: "text",
css: {
verticalAlign: "bottom",
paddingLeft: "10rpx",
fontWeight: "normal",
textDecoration: "line-through",
color: "#999999"
}
}],
type: "view"
}, {
css: {
marginTop: "32rpx",
fontSize: "26rpx",
color: "#8c5400"
},
views: [{
text: "自营",
type: "text",
css: {
color: "#212121",
background: "#ffb400"
},
}, {
text: "30天最低价",
type: "text",
css: {
marginLeft: "16rpx",
background: "#fff4d9",
textDecoration: "line-through"
},
}, {
text: "满减优惠",
type: "text",
css: {
marginLeft: "16rpx",
background: "#fff4d9"
},
}, {
text: "超高好评",
type: "text",
css: {
marginLeft: "16rpx",
background: "#fff4d9"
},
}],
type: "view"
}, {
css: {
marginTop: "30rpx"
},
views: [
{
text: "360儿童电话手表9X 智能语音问答定位支付手表 4G全网通20米游泳级防水视频通话拍照手表男女孩星空蓝",
type: "text",
css: {
paddingRight: "32rpx",
boxSizing: "border-box",
lineClamp: 2,
color: "#333333",
lineHeight: "1.8em",
fontSize: "36rpx",
width: "478rpx"
},
}, {
text: "limeui.qcoon.cn",
type: "qrcode",
css: {
width: "128rpx",
height: "128rpx",
},
}],
type: "view"
}],
type: "view"
}
]
}
}
}
```
### Nvue
- 必须为HBX 3.4.11及以上
### 原生小程序
- 插件里的`painter.js`支持在原生小程序中使用
- new Painter 之后在`source`里传入 JSON
- 再调用`render`绘制海报
- 如需生成图片,请查看微信小程序 cavnas 的[canvasToTempFilePath](https://developers.weixin.qq.com/miniprogram/dev/api/canvas/wx.canvasToTempFilePath.html)
```html
<canvas type="2d" id="painter" style="width: 100%"></canvas>
```
```js
import { Painter } from "./painter";
page({
data: {
poster: {
css: {
width: "750rpx",
},
views: [
{
type: "view",
css: {
background: "#d2d4c8",
paddingTop: "100rpx",
},
views: [
{
type: "view",
css: {
background: "#5f7470",
width: "33.33%",
height: "100rpx",
display: "inline-block",
},
},
{
type: "view",
css: {
background: "#889696",
width: "33.33%",
height: "100rpx",
display: "inline-block",
},
},
{
type: "view",
css: {
background: "#b8bdb5",
width: "33.33%",
height: "100rpx",
display: "inline-block",
},
},
],
},
],
},
},
async onLoad() {
const res = await this.getCentext();
const painter = new Painter(res);
// 返回计算布局后的整个内容尺寸
const { width, height } = await painter.source(this.data.poster);
// 得到计算后的尺寸后 可给canvas尺寸赋值达到动态响应效果
// 渲染
await painter.render();
},
// 获取canvas 2d
// 非2d也可以使用这里只是举个例子
getCentext() {
return new Promise((resolve) => {
wx.createSelectorQuery()
.select(`#painter`)
.node()
.exec((res) => {
let { node: canvas } = res[0];
resolve({
canvas,
context: canvas.getContext("2d"),
width: canvas.width,
height: canvas.height,
pixelRatio: 2,
});
});
});
},
});
```
### 旧版(1.6.x)更新
- 由于 1.8.x 版放弃了以定位的方式,所以 1.6.x 版更新之后要每个样式都加上`position: absolute`
- 旧版的 `image` mode 模式被放弃,使用`object-fit`
- 旧版的 `isRenderImage` 改成 `is-canvas-to-temp-filePath`
- 旧版的 `maxLines` 改成 `line-clamp`
## API
### Props
| 参数 | 说明 | 类型 | 默认值 |
| -------------------------- | ------------------------------------------------------------ | ---------------- | ------------ |
| board | JSON 方式的海报元素对象集 | <em>object</em> | - |
| css | 海报最外层的样式,可以理解为`body` | <em>object</em> | 参数请向下看 |
| custom-style | canvas 自定义样式 | <em>string</em> | |
| is-canvas-to-temp-filePath | 是否生成图片,在`@success`事件接收图片地址 | <em>boolean</em> | `false` |
| after-delay | 生成图片错乱,可延时生成图片 | <em>number</em> | `100` |
| type | canvas 类型,对微信头条支付宝小程序可有效,可选值:`2d``''` | <em>string</em> | `2d` |
| file-type | 生成图片的后缀类型, 可选值:`png``jpg` | <em>string</em> | `png` |
| path-type | 生成图片路径类型,可选值`url``base64` | <em>string</em> | `-` |
| pixel-ratio | 生成图片的像素密度,默认为对应手机的像素密度,`nvue`无效 | <em>number</em> | `-` |
| width | **废弃** 画板的宽度,一般只用于通过内部方法时加上 | <em>number</em> | `` |
| height | **废弃** 画板的高度 ,同上 | <em>number</em> | `` |
### css
| 属性名 | 支持的值或类型 | 默认值 |
| ----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | -------- |
| (min\max)width | 支持`%`、`rpx`、`px` | - |
| height | 同上 | - |
| color | `string` | - |
| position | 定位,可选值:`absolute`、`fixed` | - |
| ↳ left、top、right、bottom | 配合`position`才生效,支持`%`、`rpx`、`px` | - |
| margin | 可简写或各方向分别写,如:`margin-top`,支持`auto`、`rpx`、`px` | - |
| padding | 可简写或各方向分别写,支持`rpx`、`px` | - |
| border | 可简写或各个值分开写:`border-width`、`border-style` 、`border-color`,简写请按顺序写 | - |
| line-clamp | `number`,超过行数显示省略号 | - |
| vertical-align | 文字垂直对齐,可选值:`bottom`、`top`、`middle` | `middle` |
| line-height | 文字行高,支持`rpx`、`px`、`em` | `1.4em` |
| font-weight | 文字粗细,可选值:`normal`、`bold` | `normal` |
| font-size | 文字大小,`string`,支持`rpx`、`px` | `14px` |
| text-decoration | 文本修饰,可选值:`underline` 、`line-through`、`overline` | - |
| text-align | 文本水平对齐,可选值:`right` 、`center` | `left` |
| display | 框类型,可选值:`block`、`inline-block`、`flex`、`none`,当为`none`时是不渲染该段, `flex`功能简陋。 | - |
| flex | 配合 display: flex; 属性定义了在分配多余空间,目前只用为数值如: flex: 1 | - |
| align-self | 配合 display: flex; 单个项目垂直轴对齐方式: `flex-start` `flex-end` `center` | `flex-start` |
| justify-content | 配合 display: flex; 水平轴对齐方式: `flex-start` `flex-end` `center` | `flex-start` |
| align-items | 配合 display: flex; 垂直轴对齐方式: `flex-start` `flex-end` `center` | `flex-start` |
| border-radius | 圆角边框,支持`%`、`rpx`、`px` | - |
| box-sizing | 可选值:`border-box` | - |
| box-shadow | 投影 | - |
| background(color) | 支持渐变,但必须写百分比!如:`linear-gradient(,#ff971b 0%, #ff5000 100%)`、`radial-gradient(#0ff 15%, #f0f 60%)`,目前 radial-gradient 渐变的圆心为元素中点,半径为最长边,不支持设置 | - |
| background-clip | 文字渐变,配合`background`背景渐变,设置`background-clip: text` 达到文字渐变效果 | - |
| background-image | view 元素背景:`url(src)`,若只是设置背景图,请不要设置`background-repeat` | - |
| background-repeat | 设置是否及如何重复背景纹理,可选值:`repeat`、`repeat-x`、`repeat-y`、`no-repeat` | `repeat` |
| [object-fit](https://developer.mozilla.org/zh-CN/docs/Web/CSS/object-fit/) | 图片元素适应容器方式,类似于`mode`,可选值:`cover`、 `contain`、 `fill`、 `none` | - |
| [object-position](https://developer.mozilla.org/zh-CN/docs/Web/CSS/object-position) | 图片的对齐方式,配合`object-fit`使用 | - |
### 图片填充模式 object-fit
| 名称 | 含义 |
| ------- | ------------------------------------------------------ |
| contain | 保持宽高缩放图片,使图片的长边能完全显示出来 |
| cover | 保持宽高缩放图片,使图片的短边能完全显示出来,裁剪长边 |
| fill | 拉伸图片,使图片填满元素 |
| none | 保持图片原有尺寸 |
### 事件 Events
| 事件名 | 说明 | 返回值 |
| -------- | ---------------------------------------------------------------- | ------ |
| success | 生成图片成功,若使用`is-canvas-to-temp-filePath` 可以接收图片地址 | path |
| fail | 生成图片失败 | error |
| done | 绘制成功 | |
| progress | 绘制进度 | number |
### 内部函数 Ref
| 事件名 | 说明 | 返回值 |
| -------- | ---------------------------------------------------------------- | ------ |
| render(object) | 渲染器传入JSON 绘制海报 | promise |
| [canvasToTempFilePath](https://uniapp.dcloud.io/api/canvas/canvasToTempFilePath.html#canvastotempfilepath)(object) | 把当前画布指定区域的内容导出生成指定大小的图片,并返回文件临时路径。 | |
| canvasToTempFilePathSync(object) | 同步接口,同上 | |
## 常见问题
- 1、H5 端使用网络图片需要解决跨域问题。
- 2、小程序使用网络图片需要去公众平台增加下载白名单二级域名也需要配
- 3、H5 端生成图片是 base64有时显示只有一半可以使用原生标签`<IMG/>`
- 4、发生保存图片倾斜变形或提示 native buffer exceed size limit 时,使用 pixel-ratio="2"参数,降分辨率。
- 5、h5 保存图片不需要调接口,提示用户长按图片保存。
- 6、画板不能隐藏包括`v-if``v-show`、`display:none`、`opacity:0`,另外也不要把画板放在弹窗里。如果需要隐藏画板请设置 `custom-style="position: fixed; left: 200%"`
- 7、微信小程序 canvas 2d **不支持真机调试**,请使用真机预览方式。
- 8、微信小程序打开调试时可以生但并闭无法生成时这种情况一般是没有在公众号配置download域名
- 9、HBX 3.4.5之前的版本不支持vue3
- 10、在微信开发工具上 canvas 层级最高无法zindex并不影响真机
- 11、请不要导入非uni_modules插件
- 华为手机 APP 上无法生成图片,请使用 HBX2.9.11++(已过时,忽略这条)
- IOS APP 请勿使用 HBX2.9.3.20201014 的版本!这个版本无法生成图片。(已过时,忽略这条)
- 苹果微信 7.0.20 存在闪退和图片无法 onload 为微信 bug已过时忽略这条
## 打赏
如果你觉得本插件,解决了你的问题,赠人玫瑰,手留余香。
![输入图片说明](https://static-6d65bd90-8508-4d6c-abbc-a4ef5c8e49e7.bspapp.com/image/222521_bb543f96_518581.jpeg "微信图片编辑_20201122220352.jpg")
![输入图片说明](https://static-6d65bd90-8508-4d6c-abbc-a4ef5c8e49e7.bspapp.com/image/wxplay.jpg "wxplay.jpg")

View File

@@ -0,0 +1,119 @@
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title></title>
<style type="text/css">
html,
body,
canvas {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
overflow-y: hidden;
background-color: transparent;
}
</style>
</head>
<body>
<canvas id="lime-painter"></canvas>
<script type="text/javascript" src="./uni.webview.1.5.3.js"></script>
<script type="text/javascript" src="./painter.js"></script>
<script>
var cache = [];
var painter = null;
var canvas = null;
var context = null;
var timer = null;
var pixelRatio = 1;
console.log = function (...args) {
postMessage(args);
};
// function stringify(key, value) {
// if (typeof value === 'object' && value !== null) {
// if (cache.indexOf(value) !== -1) {
// return;
// }
// cache.push(value);
// }
// return value;
// };
function emit(event, data) {
postMessage({
event,
data: (typeof data !== 'object' && data !== null ? data : JSON.stringify(data))
});
cache = [];
};
function postMessage(data) {
uni.postMessage({
data
});
};
function init(dpr) {
canvas = document.querySelector('#lime-painter');
context = canvas.getContext('2d');
pixelRatio = dpr || window.devicePixelRatio;
painter = new Painter({
id: 'lime-painter',
context,
canvas,
pixelRatio,
width: canvas.offsetWidth,
height: canvas.offsetHeight,
listen: {
onProgress(v) {
emit('progressChange', v);
},
onEffectFail(err) {
//console.error(err)
emit('fail', err);
}
}
});
emit('inited', true);
};
function save(args) {
delete args.success;
delete args.fail;
clearTimeout(timer);
timer = setTimeout(() => {
const path = painter.save(args);
if (typeof path == 'string') {
const index = Math.ceil(path.length / 8);
for (var i = 0; i < 8; i++) {
if (i == 7) {
emit('success', path.substr(i * index, index));
} else {
emit('file', path.substr(i * index, index));
}
};
} else {
// console.log('canvas no data')
emit('fail', 'canvas no data');
};
}, 30);
};
async function source(args) {
let size = await painter.source(args);
emit('layoutChange', size);
if(!canvas.height) {
console.log('canvas no size')
emit('fail', 'canvas no size');
}
painter.render().catch(err => {
// console.error(err)
emit('fail', err);
});
};
</script>
</body>
</html>

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View File

@@ -697,7 +697,8 @@ namespace CoreCms.Net.Web.WebApi.Controllers
}
else if (entity.type == (int)GlobalEnumVars.ShareType.Poster) //海报
{
jm = await _shareServices.PosterShare(entity.client, entity.page, userShareCode, entity.url, entity.@params);
//jm = await _shareServices.PosterShare(entity.client, entity.page, userShareCode, entity.url, entity.@params);
jm = await _shareServices.QrShare(entity.client, entity.page, userShareCode, entity.url, entity.@params);
}
return jm;