[图片][图片]

  /*蓝牙升级通讯协议（小程序与单片机的应答） ------------------------------------------------------------------------------------------------------------------ * 五、开始下载后小程序自动重复发送每一组数据，直到收到单片机应答信息后，开始连续下载； * 六、单片机每收到一组数据，计算校验和，如果正确则应答接收正确，否则应答接收错误；  * 七、接收正确应答：2B 4F 4B CF 75  * 八、接收错误应答：2D 45 52 52 00 A4   * 九、全部下载结束后停止 ------------------------------------------------------------------------------------------------------------------ [图片] 就是我这边只能监听变化的值，却不能通过获取硬件发送过来这个值进行发送，求大佬们怎么解决这是我的部分代码  wx.onBLECharacteristicValueChange(function (res) {               console.log(`characteristic ${res.characteristicId} has changed, now is ${res.value}`, 99999999999999999999)               console.log(ab2hex(res.value)) // ArrayBuffer转16进制字符串               console.log(res.value)               that.setData({                 valueChange: valueChangeData + "|" + ab2hex(res.value), //前端显示蓝牙接收数据               })               valueChangeData = valueChangeData + '|' + ab2hex(res.value);               console.log("valueChangeData", valueChangeData)               var a = [];               a.push(valueChangeData)               console.log(a, "A")               var b = (a.toString()).split('|')               console.log(b)               valueChangeDataArray = b//定义的全局变量               // that.testSend1()               // that.writePackageData1()               var success = [43, 79, 75, 207, 117];               var successArrayBuffer = new Uint8Array(success).buffer;               console.log(successArrayBuffer)               var fail = [45, 45, 52, 52, 0, 164]               var failArrayBuffer = new Uint8Array(fail).buffer;               console.log(failArrayBuffer)               if (ab2hex(res.value) == ab2hex(successArrayBuffer)) {                 console.log("接收正确应答")                // that.testSend1()                 //that.package20Write()               } else if (ab2hex(res.value) == ab2hex(failArrayBuffer)) {                 console.log("接收错误应答，重新回调")                // that.testSend2()               }             })           }, testSend1() {     this.writeRealData1(deviceIdConnected, serviceIdConnected, characteristicsIdConnected, sendFile)   }, writeRealData1(deviceId, serviceId, characteristicId, packageData) {     const arrays = packageData;     console.log(arrays, "所有的1k")     var valueChange = valueChangeDataArray; //监听的数组     var index;     if (valueChange instanceof Array) {       valueChange.splice(0, 1);       if (valueChange.length % 57 == 0) {         index = valueChange.length / 57       } else {         index = parseInt(valueChange.length / 57)       }     } else if (valueChange == undefined) {       index = 0     }     console.log(valueChange)     console.log(index, "长度")     var success = "2b4f4bcf75" //监听成功的值     var fail = "2d4552520a4" //监听失败的值     const data = arrays[index] || null,       self = this     console.log("第", index, "包数据", data)     self.writePackageData1(deviceId, serviceId, characteristicId, data)   },   writePackageData1(deviceId, serviceId, characteristicId, Data) {     /** hex2int(hex)字符串转16进制 */     /**concatenate(resultConstructor, ...arrays)合并arraybuffer */     /////////////////校检和     //////////////////////     function CRC(array) {       var len = array.length,         sum = 0;       for (let i = 0; i < len; i++) {         sum += array[i]       }       return sum.toString(16)     }     ///////////////////////     ////////////////////////     var valueChange = valueChangeDataArray; //监听的数组     console.log(valueChange)     var valueChangeleng;     if (valueChange instanceof Array) {       valueChange.splice(0, 1);       valueChangeleng = valueChange.length - parseInt(valueChange.length / 57) * 57     } else if (valueChange == undefined) {       valueChangeleng = 0     }     const array = Data;     console.log(array, "array")     var arr = []     for (let i = 0; i < array.byteLength; i += 18) {       arr.push(array.slice(i, i + 18))     }     var uintBuffer = new Uint8Array(arr[valueChangeleng])     console.log("uintBuffer", uintBuffer)     var uintBuffers = concatenate(Uint8Array, Uint8Array.of(valueChangeleng), uintBuffer)     console.log("uintBuffers", uintBuffers)     var array1 = Array.from(uintBuffers)     //console.log(CRC.ToCRC16(array1),"校检和")     console.log(CRC(array1), "校检和")     array1.push(hex2int(CRC(array1).slice(1, 3)))     var arrayBuffer = new Uint8Array(array1).buffer;     console.log("arrayBuffer", arrayBuffer)     const data = arrayBuffer || null,       self = this     console.log("第", valueChangeleng, "次", "发送的数据为", data)     var success = "2b4f4bcf75" //监听成功的值     var fail = "2d4552520a4" //监听失败的值     if (valueChangeleng == 0) {       wx.writeBLECharacteristicValue({         deviceId,         serviceId,         characteristicId,         value: data,         success: function () {           console.log("我是第一个数据包")         }       })     } else if (data && data instanceof ArrayBuffer && valueChange[valueChangeleng] == success) {       wx.writeBLECharacteristicValue({         deviceId,         serviceId,         characteristicId,         value: data,         success: function () {           console.log("success，成功")           if (valueChangeleng < arr.length) {             sleep(20)             self.writePackageData1(deviceId, serviceId, characteristicId, Data)           }         }       })     } else if (data && data instanceof ArrayBuffer && valueChange[valueChangeleng] == fail) {       wx.writeBLECharacteristicValue({         deviceId,         serviceId,         characteristicId,         value: data,         success: function () {           console.log("fail,失败")           self.writePackageData1(deviceId, serviceId, characteristicId, Data, valueChangeleng - 1)         }       })     }   },

怎么做到地图上的polygons覆盖下面的地图呢?即使把透明弄到100%也还是不行，想把下面的地名啥的覆盖掉 [图片]

在项目中需要实现像摩拜单车一样的地图效果，markers就需要动态的从后台请求接口然后添加。动态的添加伞的markers的时候能够成功，但是在动态的添加地图中心点的标记的时候push方法一直报错，求大神指点 [图片] [图片] [图片] [图片]