的iOS如何发现蓝牙耳机及其活动 [英] iOS how to discover bluetooth headset and its events

问题描述

我试图发现蓝牙耳机，并得到其事件。我读CoreBluetooth文件和实施样本$ C $为C以下。它不火的委托方法 didDiscoverPeripheral 。

请问有什么解决此？

code：

  CBCentralManager * myCentralManager;
[myCentralManager scanForPeripheralsWithServices：无选项：无];
 - （无效）centralManagerDidUpdateState：（CBCentralManager *）{中心    //以下行打印CBCentralManagerStatePoweredOn    的NSLog（@状态：％@，[自主getCentralManagerState：central.state]）;
}
//下面的方法不火 - （无效）centralManager：（CBCentralManager *）中央didDiscoverPeripheral：（CBPeripheral *）周边advertisementData：（NSDictionary的*）advertisementData RSSI（NSNumber的*）RSSI
{}
 

解决方案

就像提到CoreBluetooth是LE设备只，结果
所以这是我做过什么来获取BluetoothHFP 设备在事件：结果
1.你需要打开AVAudioSeesion：结果
链接 AVFoundation.framework 到项目结果
2.当前可用的输入：

 的NSArray * availInputs = [[AVAudioSession sharedInstance] availableInputs]
 

3。关于路线变更通知：结果
一个。设置新的 AVAudioSession 结果
湾注册观察者 AVAudioSessionRouteChangeNotification

   - （BOOL）$ P $ {ppareAudioSession    //关闭会话
    BOOL成功= [[AVAudioSession sharedInstance] SETACTIVE：没有错误：无];
    如果（！成功）{
        的NSLog（@deactivati​​onError）;
    }    //设置音频会话类别AVAudioSessionCategoryPlayAndRecord选项AVAudioSessionCategoryOptionAllowBluetooth
    成功= [[AVAudioSession sharedInstance] setCategory：AVAudioSessionCategoryPlayAndRecord withOptions：AVAudioSessionCategoryOptionAllowBluetooth错误：无];
    如果（！成功）{
        的NSLog（@setCategoryError）;
    }    //激活音频会议
    成功= [[AVAudioSession sharedInstance] SETACTIVE：YES错误：无];
    如果（！成功）{
        的NSLog（@activati​​onError）;
    }    返回成功;
}
 

和调用这个时候你要开始听的变化：

  [自prepareAudioSession]。NSNotificationCenter * defaultCenter = [NSNotificationCenter defaultCenter]
[defaultCenter的addObserver：自我
                  选择：@选择（bluetoothAvailabilityDidChange :)
                      名：@BluetoothConnectabilityChangedNotification
                    对象：无];
 

<醇开始=4>

如果您想在后台，你需要添加音频和AirPlay目标的能力得到回调：结果

!! 这的答案是有帮助的我，当得到了解决。

I am trying to discover "Bluetooth Headset" and get its events. I read the "CoreBluetooth" documentation and implemented sample code as below. It does not fire the delegate method 'didDiscoverPeripheral'.

Is there any solution for this?

Code:

CBCentralManager *myCentralManager;
[myCentralManager scanForPeripheralsWithServices:nil options:nil];


-(void)centralManagerDidUpdateState:(CBCentralManager *)central{

    //following line prints CBCentralManagerStatePoweredOn

    NSLog(@"state:%@", [self getCentralManagerState:central.state]);
}


//following method does not fire

-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{

}

解决方案

Like mentioned CoreBluetooth is for LE devices only,
so this is what I did to get the events for BluetoothHFP devices:
1. you need to open AVAudioSeesion:
link AVFoundation.framework to your project
2. for current available inputs:

NSArray *availInputs = [[AVAudioSession sharedInstance] availableInputs];

3. for notification on route change:
a. setup new AVAudioSession
b. register observer to AVAudioSessionRouteChangeNotification

- (BOOL)prepareAudioSession {

    // deactivate session
    BOOL success = [[AVAudioSession sharedInstance] setActive:NO error: nil];
    if (!success) {
        NSLog(@"deactivationError");
    }

    // set audio session category AVAudioSessionCategoryPlayAndRecord options AVAudioSessionCategoryOptionAllowBluetooth
    success = [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionAllowBluetooth error:nil];
    if (!success) {
        NSLog(@"setCategoryError");
    }

    // activate audio session
    success = [[AVAudioSession sharedInstance] setActive:YES error: nil];
    if (!success) {
        NSLog(@"activationError");
    }

    return success;
}

and call this when you want to start listen to changes:

[self prepareAudioSession];

NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];
[defaultCenter addObserver:self
                  selector:@selector(bluetoothAvailabilityDidChange:)
                      name:@"BluetoothConnectabilityChangedNotification"
                    object:nil];

4. if you want to get the callbacks while on background, you need to add Audio and AirPlay on target's capabilities:
   

!! This answer was helpful to me when got the solution

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