检测已连接的蓝牙设备 - iOS

检测蓝牙已连接 的情况下更加具体的获取一些当前连接设备的信息数据,具体实现方法如下:

#pragma mark - ****************************** 检测已连接的蓝牙设备
+ (NSMutableDictionary *)getDetectsConnectedBluetoothDevices {
    AVAudioSessionPortDescription *portDescription = [YHUtility isBluetoothHeadsetConnectedEntity];
    NSMutableDictionary *dict = [NSMutableDictionary dictionary];
    if (portDescription) { // 已连接UID
        NSLog(@"[蓝牙检测] - 状态 - 已连接:\n[类型] - %@\n[名称] - %@\n[UID] - %@", [portDescription portType], [portDescription portName], [portDescription UID]);
        [dict setValue:[NSString convertNull:[portDescription portType]] forKey:@"type"]; // 连接方式
        [dict setValue:[NSString convertNull:[portDescription portName]] forKey:@"name"]; // 设备名称
        [dict setValue:@"active" forKey:@"state"]; // 连接状态(激活: active & 未激活: unactivated)
    } else { // 未连接
        [dict setValue:@"none" forKey:@"state"];
        
    }
    return dict;
}

#pragma mark - ****************************** 蓝牙耳机是否链接 - 实体
+ (AVAudioSessionPortDescription *)isBluetoothHeadsetConnectedEntity {
    /*
     蓝牙开启未链接耳机:
     Speaker
     
     单向保真音频协议(输出):
     BluetoothA2DPOutput
     ...
     
     双向保真音频协议(输入 & 输入):
     BluetoothHFP - HFP(Hands-Free Profile)
     BluetoothHSP - HSP(HeadSet Profile)
     
     其它:
     Receiver
     */
    AVAudioSession *session = [AVAudioSession sharedInstance];
    AVAudioSessionRouteDescription *routeDescription = [session currentRoute];
//    NSLog(@"%@", routeDescription);
    if (routeDescription) {
        NSArray *outputs = [routeDescription outputs]; // 输入源
        if (outputs && 0 < [outputs count]) {
            AVAudioSessionPortDescription *portDescription = [outputs objectAtIndex:0];
            NSString *portType = [portDescription portType];
            NSLog(@"PortType: %@", portType); // 蓝牙开启未链接: Speaker && 链接耳机: BluetoothA2DPOutput BluetoothHFP BluetoothHSP
            if (portType && [portType isEqualToString:@"BluetoothA2DPOutput"]) {
                NSLog(@"[蓝牙检测] - 状态 - 输出 - %@", [portDescription portName]);
                return  portDescription;
            } else if (portType && [portType isEqualToString:@"BluetoothHFP"] && [portType isEqualToString:@"BluetoothHSP"]) {
                NSLog(@"[蓝牙检测] - 状态 - 输出 & 输入 - %@", [portDescription portName]);
                return portDescription;
            }
        }
    }
    return nil;
}

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