iOS检测耳机插入拔出

首先，需要导入两个框架

然后，注册通知检测耳机的插入与拔出操作

     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(outputDeviceChanged:)name:AVAudioSessionRouteChangeNotification object:[AVAudioSession sharedInstance]];

     [[NSNotificationCenter defaultCenter]postNotificationName:AVAudioSessionRouteChangeNotification object:self];

通知方法

- (void)outputDeviceChanged:(NSNotification *)aNotification {

    AVAudioSessionRouteDescription* route = [[AVAudioSession sharedInstance] currentRoute];

    for (AVAudioSessionPortDescription* desc in [route outputs]) {

    if ([[desc portType] isEqualToString:AVAudioSessionPortHeadphones])

            NSLog(@"有耳机");

    else{

        NSLog(@"没有耳机");

    }

    }

}