onLoad(options) {
    if (options.amount && options.shopId) {
      this.amount = options.amount;
      this.shopId = options.shopId;
      const audio = wx.createInnerAudioContext();
      audio.src = 'https://xxx/pay.mp3';
      audio.onPause((res) => {
        console.log("audio paused by others");
      })
      audio.play();
      this.pay()
    } else {
      wx.navigateBack({
        delta: -1,
      })
    }
  },

pay() {
    wx.scanCode({
      onlyFromCamera: true,
      scanType: ['qrCode'],
    })

  }