ios - 无法使用 iBecon 信号的服务 ID 通过 CBCentral Manager 进行扫描

Question

使用 Core Bluetooth 处理 iBecon 信号，我可以使用 CBCentralManager 扫描选项进行搜索 n nil :-

Shared.sharedInstance.centralManager?.scanForPeripherals(withServices: nil, options:[CBCentralManagerScanOptionAllowDuplicatesKey:true])

但是当我提供我想要的服务 ID 时，即:-

Shared.sharedInstance.centralManager?.scanForPeripherals(withServices: [serviceID], options:[CBCentralManagerScanOptionAllowDuplicatesKey:true])

它从不调用 didDiscoverPeripheral Delegate 方法，我也需要在后台模式下扫描外围设备，根据苹果文档，无论何时需要在后台模式下扫描，您都需要明确提供服务 ID。任何人都可以帮助我在这里做错什么。

Answer 1

我是这样用的，连接按钮点击事件并使用 CBCentralManagerDelegate, CBPeripheralDelegate 委托(delegate)

func connectDevice(sender:UIButton){


                if peripheral != nil {
                    manager.cancelPeripheralConnection(peripheral)
                    manager = CBCentralManager(delegate: self, queue: nil)
                }
        }



 func centralManagerDidUpdateState(central: CBCentralManager) {
        if central.state == CBCentralManagerState.PoweredOn {
            central.scanForPeripheralsWithServices(nil, options: nil)
        } else {
            self.showAlert(Messages().alert , message: "Bluetooth is not on.")
        }
    }



 func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
        let device = (advertisementData as NSDictionary).objectForKey(CBAdvertisementDataLocalNameKey) as? NSString
        print(device)

        if device?.containsString(BEAN_NAME) == true {
            self.manager.stopScan()
            self.peripheral = peripheral
            self.peripheral.delegate = self
            manager.connectPeripheral(peripheral, options: nil)
        }
    }