蓝牙外设卡在iOS的“连接”状态

Question

我想连接到我使用BlueFruit BLE spi模块的Arduino项目。尝试使用我的iOS应用进行连接时遇到问题。在找到设备后，我试着连接它，但状态卡在'连接'状态= 1。这阻止我搜索服务，这样，因为“已连接”状态没有达到 下面是一个代码剪断......

//check state of the bluetooth on phone 
func centralManagerDidUpdateState(_ central: CBCentralManager) { 
    if central.state == .poweredOff{ 
     //TODO: ADD SAVE DATA TO REALM BEFORE DISSMISSING 
     errorView.isHidden = false 
    } 
    if central.state == .poweredOn{ 
     errorView.isHidden = true 
     //scan for peripherals with the service i created 
     central.scanForPeripherals(withServices: nil, options: nil) 
    } 
} 

//devices found(should only be ours because we will create Unique serviceID) 
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) { 
    // get advertisement data and check to make sure the name is matching. set it as the peripheral then make connection 
    if let peripheralName = advertisementData[CBAdvertisementDataLocalNameKey] as? String { 
     print("NEXT PERIPHERAL NAME: \(peripheralName)") 
     print("NEXT PERIPHERAL UUID: \(peripheral.identifier.uuidString)") 

    if peripheralName == nameID{ 
     manager.stopScan() 
     self.peripheralHalo = peripheral 
     peripheralHalo!.delegate = self 
     manager.connect(peripheral, options: nil) 

     while(peripheralHalo?.state.rawValue == 1) 
     { 
      if(manager.retrieveConnectedPeripherals(withServices: [serviceID]).count > 0){ 
       print("\(manager.retrieveConnectedPeripherals(withServices: [serviceID]))") 
      } 
     } 
    } 
     print("Connected!!") 
    } 

当我打电话manager.connect（外设，选择：无），该外设尝试连接。我添加以下while循环进行测试，并始终将状态显示为“连接”。我已经尝试了LightBlue iOS应用程序，并且我可以正确连接并接收特性值更改的通知，因此Arduino固件应该都很好。请帮助！

Answer 1

你不想那个while循环;这将阻止核心蓝牙委托线程。发出connect后，您将收到一个致电didConnectCBCentralManagerDelegate方法。一旦连接了外设，您需要在外设上拨打discoverServices，这将回调外设代理方法。然后你可以用类似的方式发现特征。

func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) { 
// get advertisement data and check to make sure the name is matching. set it as the peripheral then make connection 
    if let peripheralName = advertisementData[CBAdvertisementDataLocalNameKey] as? String { 
     print("NEXT PERIPHERAL NAME: \(peripheralName)") 
     print("NEXT PERIPHERAL UUID: \(peripheral.identifier.uuidString)") 

     if peripheralName == nameID { 
      self.peripheralHalo = peripheral 
      central.stopScan() 
      central.connect(peripheral, options: nil) 
     } 
    } 
} 

func centralManager(_ central: CBCentralManager, 
       didConnect peripheral: CBPeripheral) { 
    print("Connected!!") 
    peripheralHalo!.delegate = self 
    peripheral.discoverServices([serviceID) 
} 

另外，如果你要存储的东西，标识要连接到的周边，我建议你使用标识符，而不能作为名称可以更改名称。