SwiftUI - 在蓝牙扫描设备时选择特定的服务

Question

在扫描设备时选择特定服务

我做了一个程序，我想用特定的服务来扫描一个设备（我的设备是一个温度计 "SHT31"，服务是电池服务 "UUID: 180F"），但是当我在iPhone上运行这个程序时，它并没有扫描设备。而当 "withServices: nil "时，它会扫描设备。你有解决办法吗？

我的代码:

import CoreBluetooth

 class BLEConnection: NSObject, CBCentralManagerDelegate, CBPeripheralDelegate {
    var centralManager: CBCentralManager!
    var myPeripheral: CBPeripheral!
    let batteryServiceCBUUID = CBUUID(string: "0x180F")

    func startCentralManager() {
        self.centralManager = CBCentralManager(delegate: self, queue: nil)
    }

    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        switch (central.state) {
           case .unsupported:
            print("BLE is Unsupported")
            break
           case .unauthorized:
            print("BLE is Unauthorized")
            break
           case .unknown:
            print("BLE is Unknown")
            break
           case .resetting:
            print("BLE is Resetting")
            break
           case .poweredOff:
            print("BLE is Powered Off")
            break
           case .poweredOn:
            print("BLE powered on")
            central.scanForPeripherals(withServices: [batteryServiceCBUUID], options: nil)
            break
        @unknown default:
            break
        }
    }

    func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
        if let pname = peripheral.name {
//            print(pname)

            if pname == "Smart Humigadget" {
                self.centralManager.stopScan()
                self.myPeripheral = peripheral
                self.myPeripheral.delegate = self
                self.centralManager.connect(peripheral, options: nil)
                print("\(pname) is connected")
            }
        }
    }
    func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
        self.myPeripheral.delegate = self
        self.myPeripheral.discoverServices(nil)
    }
}

Answer 1

使用以下格式（不需要十六进制前缀）。

    let batteryServiceCBUUID = CBUUID(string: "180F")