iOS开发 蓝牙4.0

github demo 下载地址,有问题请评论或者在git上提交问题

1. 用到的类,基本和HomeKit差不多

类名	描述
CBCentralManager	蓝牙管理,用于扫描和链接蓝牙硬件
CBPeripheral	蓝牙设备
CBService	蓝牙设备的服务
CBCharacteristic	服务的描述特征值

2. 步骤

1. 创建管理者CBCentralManager,进行扫描
2. 获得扫描的设备CBPeripheral,进行连接
3. 扫描设备的服务CBService
4. 获取服务的特征值 CBCharacteristic
5. 特征值的读写
6. 断开连接

3. 代码实现

1. 创建管理者,并开始扫描

     CBCentralManager *blueToothManager =  [[CBCentralManager alloc]initWithDelegate:self queue:nil];
    [blueToothManager scanForPeripheralsWithServices:nil options:nil];

这个时候系统会自动提示打开蓝牙,不需要我们操作

获取到链接状态

- (void)centralManagerDidUpdateState:(CBCentralManager *)central{
    switch (central.state) {
        case CBManagerStateUnknown:
            NSLog(@">>>CBCentralManagerStateUnknown");
            break;
        case CBManagerStateResetting:
            NSLog(@">>>CBCentralManagerStateResetting");
            break;
        case CBManagerStateUnsupported:
            NSLog(@">>>CBCentralManagerStateUnsupported");
            break;
        case CBManagerStateUnauthorized:
            NSLog(@">>>CBCentralManagerStateUnauthorized");
            break;
        case CBManagerStatePoweredOff:
            //如果是关闭,系统会提示打开,我们不用管
            NSLog(@">>>CBCentralManagerStatePoweredOff");
            break;
        case CBManagerStatePoweredOn:
            //打开的
            NSLog(@">>>CBCentralManagerStatePoweredOn");
            break;
        default:
            break;
    }
}

2. 在代理中获得,扫描设备

扫描service,遵循代理,走代理方法

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{
//这里就加入数组,继续扫描,刷新表
    peripheral.delegate = self;
    [peripheral discoverServices:nil];
}

3. 扫描到服务,并扫描服务的特征值

-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    if (error){
        NSLog(@"扫描外设服务出错：%@-> %@", peripheral.name, [error localizedDescription]);
        return;
    }
    NSLog(@"扫描到外设服务：%@ -> %@",peripheral.name,peripheral.services);
    for (CBService *service in peripheral.services) {
        [peripheral discoverCharacteristics:nil forService:service];
        //添加到数组
        //[self.serviceArray addObject:service];
    }
    NSLog(@"开始扫描外设服务的特征 %@...",peripheral.name);
    
}

4. 扫描到服务的特征值

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
//扫描到service会走这个方法.然后我们监听并接收特征的改变
   for (CBCharacteristic *characteristic in service.characteristics){
        [peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
}

5. 写属性

            [perpher writeValue:theData forCharacteristic:character type:CBCharacteristicWriteWithoutResponse];

4. 上demo

github demo 下载地址,有问题请评论或者在git上提交问题

• demo实现了扫描周围的蓝牙设备,并链接
  可以查看的一些特征值
  对小米手环的一些特征值做了识别和处理

扫描界面 特征值1 特征值2