[WeChat applet] Use wx.scanCode method to realize the function of scanning QR code

In the WeChat applet, you can use wx.scanCodethe method to realize the function of scanning the QR code. Here is a simple sample code:

// 在某个页面或组件中调用扫描二维码功能
wx.scanCode({
    
    
  success(res) {
    
    
    console.log(res.result); // 扫描结果
  },
  fail(res) {
    
    
    console.log(res.errMsg); // 扫描失败的错误信息
  }
});

In the above code, we use wx.scanCodethe method to call the function of scanning the QR code. The callback function will be called when the scan is successful , and the callback function will be called successwhen the scan fails . failThe content of the scan result can be obtained by res.result.

Please note that in order to use the method, you need to add the corresponding permission configuration in wx.scanCodethe configuration file of the WeChat applet .app.json"{"permission": {"scope.userLocation": {"desc": "用于获取用户位置信息"}}}"

In addition, you need to add the corresponding permission configuration in the JSON configuration file of the page or component "{"usingComponents": {"wxparser": "path/to/wxparser"}}".

You can make corresponding modifications and adjustments according to actual needs and page structure.