插件导入地址：
https://ext.dcloud.net.cn/plugin?id=1287#detail
<template><view><u-qrcode ref="qrcode" canvas-id="qrcode" :value="link" :size="size"></u-qrcode><button @click="saveQrcode">保存二维码</button></view></template>
<script>export default {data() {return {link: 'https://www.baidu.com/', //二维码内容size: 150 //二维码大小}},methods: {// 保存二维码saveQrcode() {this.$refs.qrcode.save({success: res => {console.log(res)}})}}}</script>
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