将心率测量服务添加到iPhone作为外围设备

心率服务详情请见 bluetooth developer portal.
假设您已经初始化了名为peripheralManager的CBPeripheralManager,并且您已经收到了具有CBPeripheralManagerStatePoweredOn状态的peripheralManagerDidUpdateState：callback.以下是在此之后如何设置服务的方法.

// Define the heart rate service
CBMutableService *heartRateService = [[CBMutableService alloc] 
      initWithType:[CBUUID UUIDWithString:@"180D"] primary:true];

// Define the sensor location characteristic    
char sensorLocation = 5;
CBMutableCharacteristic *heartRateSensorLocationCharacteristic = [[CBMutableCharacteristic alloc]
      initWithType:[CBUUID UUIDWithString:@"0x2A38"] 
        properties:CBCharacteristicPropertyRead 
             value:[NSData dataWithBytesNoCopy:&sensorLocation length:1] 
       permissions:CBAttributePermissionsReadable];

// Define the heart rate reading characteristic    
char heartRateData[2]; heartRateData[0] = 0; heartRateData[1] = 60;
CBMutableCharacteristic *heartRateSensorHeartRateCharacteristic = [[CBMutableCharacteristic alloc] 
      initWithType:[CBUUID UUIDWithString:@"2A37"]
        properties: CBCharacteristicPropertyNotify
             value:[NSData dataWithBytesNoCopy:&heartRateData length:2]
       permissions:CBAttributePermissionsReadable];

// Add the characteristics to the service 
heartRateService.characteristics = 
      @[heartRateSensorLocationCharacteristic,heartRateSensorHeartRateCharacteristic];

// Add the service to the peripheral manager    
[peripheralManager addService:heartRateService];

在此之后,您应该收到peripheralManager：didAddService：error：表示添加成功的回调.您应该同样添加device information service (0x180A)最后,您应该开始做广告：

NSDictionary *data = @{
    CBAdvertisementDataLocalNameKey:@"iDeviceName",CBAdvertisementDataServiceUUIDsKey:@[[CBUUID UUIDWithString:@"180D"]]};

[peripheralManager startAdvertising:data];

注意：心率服务也是我实施的第一个.好的选择.

（编辑：李大同）

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