setTimeout(()=>{
      wx.scanCode({
        success: (res) => {
          
        },
        fail: (res) => {
          
          wx.showToast({
            title: '扫码失败',
            icon: 'none',
            image: '../../imgs/error.png',
            duration: 2000
          });
        },
        complete: (res) => {

         
        }
      })
    },500)