AVAudioPlayer playback stops when new NSView is added

Question

I have AVAudioPlayer instance playing music. The instance is in the controller for the main view on my main window - it isn't very fancy, but it works:

in the .h

@interface ViewController () {
    AVAudioPlayer *music;
}
@end

in the .m

- (void)viewDidLoad
{
    [super viewDidLoad];

    music = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/music01.mp3", [[NSBundle mainBundle] resourcePath]]] error:nil];
    [music playAtTime:0]; // play from start
    [music prepareToPlay];
}

-(void)playMusic {
    if (music) {
        [music play];
    }
}

So far so good. Except that if I add a view (programatically, with it's own NSViewController) to the main view the music stops. Suddenly. Is this normal? What have I done wrong?

Answer 1

My intuition is that you somehow call stop on your AVAudioPlayer instance when that view gets added to the window. There are many ways in which you can debug this, but, I'd put a symbolic breakpoint (you can read more about this kind of breakpoints here on SO) in the stop method and see if it gets called and from where. Also, check if you don't call viewDidLoad again when you add a new view (due to the inheritance you might have in place)

Otherwise, there's no way adding a view might trigger a system issue that might stop your instance.