- 当前 Bug 的表现（可附上截图）

- 预期表现

- 复现路径

- 提供一个最简复现 Demo

onLoad: function (options) {

var _that = this

var deviceId = options.id

wx.getBLEDeviceServices({

    deviceId: deviceId,

    success(res) {

        console.log(res)

        //setTimeout(function(){

        wx.getBLEDeviceCharacteristics({

            // 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

            deviceId: deviceId,

            // 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取

            serviceId:res.services[2].uuid,

            success(res55) {

                console.log('device getBLEDeviceCharacteristics:', res55)

wx.onBLECharacteristicValueChange(function (characteristic) {

console.log(characteristic)

var dv = new Int16Array(characteristic.value)

for (let j = 0; j < dv.length; j++) {

arr[j] = (dv[j] / 10).toFixed(1)

}

arr = common.resetArray(arr, dv1[0])

for (var z = 0; z < arr.length; z++) {

arr[z].push(dv1[0] * 128 + z)

_this.data.upPage[1].push(arr[z])

}

console.log(arr)

})

wx.readBLECharacteristicValue({

deviceId: deviceId,

serviceId: res6.services[0].uuid,

characteristicId: '0000FF50-0000-1000-8000-00805F9B34FB',//此特征值的value是512字节长的16进制

success(res8) {

console.log(res8)

}

})

            },

            fail(res44){

                console.log(res44)

            },

            complete(res22){

                console.log(res.services[2].uuid)

                console.log(res22)

            }

        })

    }

})

},

小程序IOS能否直接读取一个长度为512字节的特征值（IOS不行，Android可以）