How to use the WeChat applet to identify QR codes using the camera

How does the WeChat applet use the camera to identify QR codes

The WeChat applet provides us with an API: wx.scanCode(Object object ), you can use it to call the code scanning function to identify the QR code.

Recommended learning: Small program development

The method of using a camera to identify QR codes is as follows:

1. First write wxml file, add a button that calls the code scanning function

  二维码内容
  
  

2, then write the click event of the button, and output the recognized QR code content.

data: {
  scanCodeMsg: "",
},
scanCode: function() {
  var that = this;
  wx.scanCode({ //扫描API
    success(res) { //扫描成功
      console.log(res) //输出回调信息
      that.setData({
        scanCodeMsg: res.result
      });
      wx.showToast({
        title: '成功',
        duration: 1000
      })
    }
  })
},

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