Playing music at back ground: AVAudioSessionInterruptionNotification not fired

Question

My app is playing in background well. Pause and play also works well even my app is background using the methods registered for AVAudioSessionInterruptionNotification.

The problem arrives steps for the scenario:

1. Launch my app -> goes background music from my app playing well
2. launch apple's music app and play. AVAudioSessionInterruptionNotification fired.
3. When i pause the music app or kill the music app. AVAudioSessionInterruptionNotification doesn't get fired

Code: I am doing this in appdelegate. didfinishlaunching

NSError *sessionError = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&sessionError];
[[AVAudioSession sharedInstance] setActive:YES error: nil];

self.player = [[AVQueuePlayer alloc] initWithURL:[NSURL URLWithString:@"http://someurl.com:8040/;stream.mp3"]];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onAudioSessionEvent:) name:AVAudioSessionInterruptionNotification object:nil];




- (void) onAudioSessionEvent: (NSNotification *) notification
{
    //Check the type of notification, especially if you are sending multiple AVAudioSession events here
    NSLog(@"Interruption notification name %@", notification.name);

    if ([notification.name isEqualToString:AVAudioSessionInterruptionNotification]) {
        NSLog(@"Interruption notification received %@!", notification);

        //Check to see if it was a Begin interruption
        if ([[notification.userInfo valueForKey:AVAudioSessionInterruptionTypeKey] isEqualToNumber:[NSNumber numberWithInt:AVAudioSessionInterruptionTypeBegan]]) {
            NSLog(@"Interruption began!");

        } else if([[notification.userInfo valueForKey:AVAudioSessionInterruptionTypeKey] isEqualToNumber:[NSNumber numberWithInt:AVAudioSessionInterruptionTypeEnded]]){
            NSLog(@"Interruption ended!");
            //Resume your audio
            NSLog(@"Player status %i", self.player.status);
            // Resume playing the audio.
            [self.player play];

        }
    }
}

Answer 1

I had similar problem with interrupts. iOS: Siri not available does not return AVAudioSessionInterruptionOptionShouldResume

Ended up using applicationWillResignActive and applicationDidBecomeActive instead.

Answer 2

There is Property of your AVCaptureSession instance: @property(nonatomic) BOOL usesApplicationAudioSession

It is YES by default just set it to NO, and will works fine.

Answer 3

Try to add object:session

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