我們要建立藍牙我們需要多寫一個Swift，因為這樣我們在呼叫的時候就不會覺得，畫面非常的亂，我們將藍芽設定完後

   var central: CBCentralManager?

我們將程式設為副線程，並且將代理指派給自己

        let queue = DispatchQueue.global()
        central = CBCentralManager(delegate: self, queue: queue)

讓我們將掃描的程式打上去

central?.scanForPeripherals(withServices: nil, options: nil)

如果我們要停止掃描的話我們要用

central?.stopScan()

當程式開始運作我們就能夠看到附近的藍芽掃描出來了，下期我們再來教如何將掃描出來的藍芽顯示出來
我們通常會寫一個extension

extension BluetoothServices: CBCentralManagerDelegate {
    
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        switch central.state {
        case .unknown:
            print("unknown")
        case .resetting:
            print("resetting")
        case .unsupported:
            print("unsupported")
        case .unauthorized:
            print("unauthorized")
        case .poweredOff:
            print("poweredOff")
        case .poweredOn:
            print("poweredOn")
        @unknown default:
            print("藍芽裝置未知狀態")
        }
        
        startScan()
    }
    
    /// 發現裝置
    func centralManager(_ central: CBCentralManager,
                        didDiscover peripheral: CBPeripheral,
                        advertisementData: [String : Any],
                        rssi RSSI: NSNumber) {
        for newPeripheral in blePeripherals {
            if peripheral.name == newPeripheral.name {
                return
            }
        }
        
        if let name = peripheral.name {
            blePeripherals.append(peripheral)
            print(name)
        }
        
        delegate?.getBLEPeripherals(peripherals: blePeripherals)
    }
    
    /// 連接裝置
    func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
        peripheral.delegate = self
        peripheral.discoverServices(nil)
    }
    
    
}

這樣我們就可以把裝置名稱放到name裏面