Not able to scan Through CBCentral Manager with se

问题:

Working on iBecon signal using Core Bluetooth i am able to search with CBCentralManager scan optionn nil :-

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

But when i provide my desirable service ID i.e :-

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

it never calls didDiscoverPeripheral Delegate method, I need to scan the peripheral in background mode too and according to apple documentation you need to provide service id explicitly whenever you need to scan in background mode. Anyone can help what i am doing wrong here.

回答1:

I am using like this, connect on button click event and use CBCentralManagerDelegate, CBPeripheralDelegate 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)
        }
    }