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aihe 2024-05-13 19:02:16 +08:00
parent 8441d5eb09
commit 5d3ac55f07
1 changed files with 5 additions and 2 deletions
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7
components/tpx-bluetooth-print/render-template.vue
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@ -6,7 +6,7 @@
<template v-slot:content> <template v-slot:content>
<view class="pt-20 pb-10">打印内容</view> <view class="pt-20 pb-10">打印内容</view>
<view class="canvas-con"> <view class="canvas-con">
<canvas canvas-id="shareCanvas" :style="{width:canvasWidth + 'px', height: canvasHeight + 'px'}"></canvas> <canvas :canvas-id="canvasId" :style="{width:canvasWidth + 'px', height: canvasHeight + 'px'}"></canvas>
</view> </view>
</template> </template>
</tpx-bluetooth> </tpx-bluetooth>
@ -36,7 +36,7 @@ export default {
}, },
data () { data () {
return { return {
canvasId: 'shareCanvas', canvasId: uni.$u.guid(20),
canvasWidth: 1, canvasWidth: 1,
canvasHeight: 1, canvasHeight: 1,
imgData: '', imgData: '',
@ -110,6 +110,9 @@ export default {
console.log("===renderCanvasImg:filePath=====", filePath) console.log("===renderCanvasImg:filePath=====", filePath)
return new Promise(async (resolve, reject)=> { return new Promise(async (resolve, reject)=> {
try{ try{
// 多次渲染，createCanvasContext，必须使用新的才可以
that.canvasId = uni.$u.guid(20)
await promiseTimeout(500)
let res = await getImageInfo(filePath) let res = await getImageInfo(filePath)
console.log("getImageInfo res====", res) console.log("getImageInfo res====", res)
const ctx = uni.createCanvasContext(that.canvasId, that); const ctx = uni.createCanvasContext(that.canvasId, that);