AVAudioPlayer stops playing immediately with ARC

by

The problem is that when compiling with ARC you need to make sure to keep a reference to instances that you want to keep alive as the compiler will automatically fix “unbalanced” alloc by inserting release calls (at least conceptually, read Mikes Ash blog post for more details). You can solve this by assigning the instance to a property or a instance variable.

In Phlibbo case the code will be transformed into:

- (void)viewDidLoad
{
    [super viewDidLoad];        
    NSString* recorderFilePath = [NSString stringWithFormat:@"%@/MySound.mp3", [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]];    
    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:recorderFilePath] error:nil];
    audioPlayer.numberOfLoops = 1;
    [audioPlayer play];
    [audioPlayer release]; // inserted by ARC
}

And the AVAudioPlayer it will stop playing immediately as it gets deallocated when no reference is left.

I haven’t used ARC myself and have just read about it briefly. Please comment on my answer if you know more about this and I will update it with more information.

More ARC information:
Transitioning to ARC Release Notes
LLVM Automatic Reference Counting

More Related Contents:

  1. How do I avoid capturing self in blocks when implementing an API?
  2. How do I implement an Objective-C singleton that is compatible with ARC?
  3. How can I reduce the file size of a video created with UIImagePickerController?
  4. iOS background audio not playing
  5. In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
  6. AVAudioPlayer not playing any sound
  7. Does ARC work with Core Graphics objects?
  8. ARC – The meaning of __unsafe_unretained?
  9. iOS AVFoundation: How do I fetch artwork from an mp3 file?
  10. Custom dealloc and ARC (Objective-C)
  11. WaveForm on IOS
  12. fake va_list in ARC
  13. How can I disable ARC for a single file in a project?
  14. How dangerous is it to compare floating point values?
  15. UIView frame, bounds and center
  16. “Thread 1: stopped at breakpoint” error when initializing an NSURL object
  17. UIImage resizing not working properly
  18. Looping a video with AVFoundation AVPlayer?
  19. Get list of all installed apps
  20. Animating an image view to slide upwards
  21. What’s the difference between performSelectorOnMainThread: and dispatch_async() on main queue?
  22. How to create Multiple Themes/Skins for iphone apps? [closed]
  23. Objective-C: Where to remove observer for NSNotification?
  24. How to dispatch on main queue synchronously without a deadlock?
  25. Prototype Cells in a nib instead of a storyboard
  26. NSDateFormatter return incorrect date from string
  27. RestKit: How does one post an array of objects?
  28. Use Data From Class Without A New Init
  29. What is the empty @interface declaration in .m files used for?
  30. Getting reference to the top-most view/window in iOS application

Leave a Comment