调用微信接口扫描二维码

界面文件

<view>  
  <view bindtap="click">点我扫一扫</view>  
  <view>{{show}}</view>  
</view> 

js文件

//获取应用实例  
var app = getApp()
Page({
  data: {
    show: "",
  },
 
  onLoad: function () {
    console.log('onLoad')
  },
  click: function () {
    var that = this;
    var show;
    wx.scanCode({
      success: (res) => {
        this.show = "结果:" + res.result + "二维码类型:" + res.scanType + "字符集:" + res.charSet + "路径:" + res.path;
        that.setData({
          show: this.show
        })
        wx.showToast({
          title: '成功',
          icon: 'success',
          duration: 2000
        })
      },
      fail: (res) => {
        wx.showToast({
          title: '失败',
          icon: 'success',
          duration: 2000
        })
      },
      complete: (res) => {
      }  
    })
  }
})