iOS 监听耳机插入和拔出[检索]

使用通知的方式，添加收到通知的回调方法

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(audioRouteChangeListenerCallback:)   name:AVAudioSessionRouteChangeNotification object:nil];

响应通知回调。

- (void)audioRouteChangeListenerCallback:(NSNotification*)notification{NSDictionary *interuptionDict = notification.userInfo;NSInteger routeChangeReason = [[interuptionDict valueForKey:AVAudioSessionRouteChangeReasonKey] integerValue];switch (routeChangeReason) {case AVAudioSessionRouteChangeReasonNewDeviceAvailable:NSLog(@"AVAudioSessionRouteChangeReasonNewDeviceAvailable");NSLog(@"耳机插入");break;case AVAudioSessionRouteChangeReasonOldDeviceUnavailable:NSLog(@"AVAudioSessionRouteChangeReasonOldDeviceUnavailable");NSLog(@"耳机拔出，停止播放操作");break;case AVAudioSessionRouteChangeReasonCategoryChange:// called at start - also when other audio wants to playNSLog(@"AVAudioSessionRouteChangeReasonCategoryChange");break;}}