使用CoreBluetooth检测Apple Watch

Question

我发现使用我的iPhone上的Core Bluetooth的蓝牙设备，但它没有拿起Apple Watch。有什么我失踪？下面是我使用下面的代码：

#pragma mark - CBCentralManagerDelegate 

// method called whenever you have successfully connected to the BLE peripheral 
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral 
{ 
} 

// CBCentralManagerDelegate - This is called with the CBPeripheral class as its main input parameter. This contains most of the information there is to know about a BLE peripheral. 
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI 
{  NSLog(@"%@", [peripheral name]); 
} 


// method called whenever the device state changes. 
- (void)centralManagerDidUpdateState:(CBCentralManager *)central 
{ 
switch ([central state]) 
{ 
    case CBCentralManagerStatePoweredOff: 
     NSLog(@"CoreBluetooth BLE hardware is powered off"); 
     break; 
    case CBCentralManagerStatePoweredOn: 
     NSLog(@"CoreBluetooth BLE hardware is powered on and ready"); 
     [[self bluetoothManager] scanForPeripheralsWithServices:nil options:nil]; 
     break; 
    case CBCentralManagerStateResetting: 
     NSLog(@"CoreBluetooth BLE hardware is resetting"); 
     break; 
    case CBCentralManagerStateUnauthorized: 
     NSLog(@"CoreBluetooth BLE state is unauthorized"); 
     break; 
    case CBCentralManagerStateUnknown: 
     NSLog(@"CoreBluetooth BLE state is unknown"); 
     break; 
    case CBCentralManagerStateUnsupported: 
     NSLog(@"CoreBluetooth BLE hardware is unsupported on this platform"); 
     break; 
    default: 
     break; 
} 
} 

Answer 1

我的Apple关注表明，当我运行下面的代码：

[self.centralManager retrieveConnectedPeripheralsWithServices:@[[CBUUID UUIDWithString:@"180A"]]]; 

180A是设备信息服务。

不确定您可以发现和订阅哪些特征（如果有），但您绝对可以检测手表的存在。