出入码支持支付宝小程序

miniprogram/src/pages/residents/code.vue

@@ -98,7 +98,7 @@ export default {
   },
   methods: {
     drawCode(text = 'https://www.baidu.com/', foreground = 'red') {
-      const query = wx.createSelectorQuery()
+      const query = Taro.createSelectorQuery()
       query.select('#myQrcode')
         .fields({
           node: true,
@@ -108,7 +108,7 @@ export default {
           var canvas = res[0].node
 
           // 调用方法drawQrcode生成二维码
-          drawQrcode({
+          drawQrcode(Taro, {
             canvas: canvas,
             canvasId: 'myQrcode',
             width: 260,

miniprogram/src/utils/qrcode/index.js

@@ -25,7 +25,7 @@ function utf16to8(str) {
   return out
 }
 
-function drawQrcode(options, debug) {
+function drawQrcode(Taro, options, debug) {
   options = options || {}
   options = extend(true, {
     canvasId: 'myQrcode',
@@ -66,18 +66,18 @@ function drawQrcode(options, debug) {
   } else {
 
     return new Promise(function (resolve, reject) {
-      return resolve(createCanvas());
+      return resolve(createCanvas(Taro));
     })
 
   }
 
-  function createCanvas() {
+  function createCanvas(Taro) {
     // create the qrcode itself
     var qrcode = new QRCode(options.typeNumber, options.correctLevel)
     qrcode.addData(utf16to8(options.text))
     qrcode.make()
 
-    const dpr = wx ? wx.getSystemInfoSync().pixelRatio : 1 // 兼容支付宝小程序
+    const dpr = Taro.getSystemInfoSync().pixelRatio
     var canvas = options.canvas
     const ctx = canvas.getContext('2d')
     canvas.width = options.width * dpr