蓝牙监听不一致，几天了都没解决，求助！！

同样的代码，同一个设备，安卓没有问题，但IOS就会报：

notifyBLECharacteristicValueChange:fail setNotifyOnCharacteristics error 10007

var that = this;
    wx.notifyBLECharacteristicValueChange({
      state: true, // 启用 notify 功能
      deviceId: that.data.deviceId,
      serviceId: that.data.serviceId,
      characteristicId: that.data.notifyCharacteristicId,
      success: function (res) {
        console.log('[ok]8.2 notify启动成功', res.errMsg);
        console.log('[监听]' + that.data.deviceId + '--' + that.data.serviceId + '--' + that.data.notifyCharacteristicId);
        that.onBLECharacteristicValueChange(); //监听特征值变化
      },
      fail: function (res) {
        console.log('[ok]8.2 notify启动失败', res.errMsg);
        console.log('[监听]' + that.data.deviceId + '--' + that.data.serviceId + '--' + that.data.notifyCharacteristicId);
        wx.showToast({
          title: 'notify启动失败',
          mask: true
        });
        setTimeout(function () {
          wx.hideToast();
        }, 2000)
      }