【微信分享】H5页在微信内打开，进入分享操作时，获取ticket，偶发返回null 获取ticket接口 https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=45_7UItIpChFVO1OWQfh6DNBmtbHRbmswM4t-1W_9FUQ5RGJR6DMWa1kGvEhLaSRmd51n0e1KHqi_paaCpiNEHnce9ijrr46PcB3qYal4HSxlzcBTGrX8wHBedMM8an_ER4JuGr8kJRfVMorL5LKTPdABAZIE&type=jsapi

ios版本11.41，微信版本6.7.1，基础库版本2.2.5 直接上代码了，deviceId、serviceId、characteristicId都是通过api获取到的，在向蓝牙设备做写操作的时候，一直返回错误代码10008，错误信息“The value's length is invalid”，请问是接口参数调用问题，还是蓝牙设备返回了错误信息。跪求各位大佬帮忙解决一下，万分感谢。    var hex = '1b840084'    var typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) {      return parseInt(h, 16)    }))    var buffer = typedArray.buffer;//that.hexStringToArrayBuffer(test)    wx.writeBLECharacteristicValue({      deviceId: '291B5157-23FD-61D3-90D5-2D44D314FB97',      serviceId: '0000FFE5-0000-1000-8000-00805F9B34FB',      characteristicId: '0000FFE9-0000-1000-8000-00805F9B34FB',      value: buffer,      success: function (res) {        console.log('write success')      },      fail: function(res) {        console.log('write fail')        console.log(res)      }    })

同样的代码，在安卓手机可以正常调用writeBLECharacteristicValue向蓝牙设备写入，但是在iphone手机（版本11.2.2）上调用，返回错误编码10008，错误信息“the value's length is invalid”，请大佬告知如何解决。代码如下： wx.notifyBLECharacteristicValueChange({      state: true,      deviceId: deviceId,      serviceId: notifyserviceId,      characteristicId: notifycharacteristicId,      success: function (res) {        console.log("notify success")        setTimeout(function () {          that.writeBLECharacteristicValue(deviceId, writeserviceId, writecharacteristicId)        }, 2000);      },      fail: function (res) {        console.log("notify fail:" + res.errMsg)      }, complete : function() {        wx.onBLECharacteristicValueChange(function (res) {          console.log(res)        });      }    })  },  writeBLECharacteristicValue: function (deviceId, writeserviceId, writecharacteristicId) {    var that = this    let buffer = new ArrayBuffer(1)    let dataView = new DataView(buffer)    dataView.setUint8(0, 0)    wx.writeBLECharacteristicValue({      deviceId: deviceId,      serviceId: writeserviceId,      characteristicId: writecharacteristicId,      value: buffer,      success: function (res) {        console.log('write success')      },      fail(res) {        console.log('write fail')        console.log(res)      }    })  },