iOS CBPeripheral 连接问题

Question

我调用方法

( void)connectPeripheral:(CBPeripheral *)peripheral options:(nullable NSDictionary<NSString *, id> *)options;

要连接我的设备，我的设备在范围内，但我的应用程序仍然无法连接我的设备成功，当我关闭系统 BT 然后打开 BT，我的应用程序将连接我的设备成功，我没有知道为什么吗？

如果不关闭BT再开启，是否可以调用first call方法

(void)cancelPeripheralConnection:(CBPeripheral *)peripheral;

然后调用

( void)connectPeripheral:(CBPeripheral *)peripheral options:(nullable NSDictionary<NSString *, id> *)options;

这有意义吗？

Answer 1

要检查天气您的设备是否已连接，您可以使用这两个委托(delegate)方法: objective-c :

1) -(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral

2) -(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)外设错误:(NSError *)error

@property (nonatomic, strong) CBPeripheral *heartRatePeripheral;
#define heartRateServiceCBUUID [CBUUID UUIDWithString:@"0x180D"]

-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral 
  *)peripheral
{ 
  [self.Customdelegate HRMoniterStatus:peripheral Status:@"Connected"];
  [_heartRatePeripheral discoverServices:@[heartRateServiceCBUUID]];
}

自定义委托(delegate):

-(void)HRMoniterStatus:(CBPeripheral *)HRMoniter Status:(NSString 
*)connectionStatus
{
  NSLog(@"HRMoniter connection status ::- %@",connectionStatus);
}

---

swift :

1) func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral)

2) func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: 错误？)

let heartRateServiceCBUUID = CBUUID(string: "0x180D")

let heartRatePeripheral : CBPeripheral

func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral)
{
    Customdelegate.hrMoniterStatus(peripheral, status: "Connected")
    heartRatePeripheral.discoverServices([heartRateServiceCBUUID])
}

自定义委托(delegate):

func hrMoniterStatus(_ HRMoniter: CBPeripheral?, status connectionStatus: String?) 
{
   print("HRMoniter connection status ::- \(connectionStatus ?? "")")
}