Using AVAudioPlayer in iOS5?

Question

So I'm trying to play a .wave file in iOS5, and I'm getting a warning, which is leading to SIGABRTs and generally not-working code.

NSURL *soundUrl = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/Resources/Sounds/01_main_menu_list.wav", [[NSBundle mainBundle] resourcePath]]];
self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
[_audioPlayer setDelegate:self];
[_audioPlayer play];

This is giving me an error "Sending "ViewController *const __strong" to parameter of incompatible type 'id '.

I have literally no idea why, I've followed a half-dozen examples and am coming up empty. I'd love a pointer in the right direction.

score 2 · Answer 1 · answered Feb 08 '12 at 10:58

2

This should work:

NSURL* soundUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"01_main_menu_list" ofType:@"wav"]]; 
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
audioPlayer.delegate = self;
[audioPlayer play];

If not, I think there's something wrong with the wav file. Maybe the encoding?

answered Feb 08 '12 at 10:58

Richard G. Nielsen

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That got the file playing, but the warning is still there. Any idea what it means and how I can knock it on the head? It's been drilled into my head that a warning is just an error which hasn't crashed yet :) – Luke Feb 08 '12 at 11:04
At which line of code do you get the warning, and what exactly does it say? – Richard G. Nielsen Feb 08 '12 at 11:06
the delegate line, and it says exactly what I wrote above. "Sending "ViewController *const __strong" to parameter of incompatible type 'id '. – Luke Feb 08 '12 at 11:16
Try to change audioPlayer.delegate = self; to audioPlayer.delegate = (id)self; – Richard G. Nielsen Feb 08 '12 at 11:23
Also: See this question: http://stackoverflow.com/questions/6364911/handling-app-delegates-and-switching-between-views – Richard G. Nielsen Feb 08 '12 at 11:26

score 0 · Accepted Answer · answered Feb 21 '12 at 15:38

0

Turned out it was an issue with ARC releasing, I fixed it by adding a @property and @synthesize pair for the AVAudioPlayer in question, and declaring it as strong. It got rid of all of these errors, and played the file with no problems.

answered Feb 21 '12 at 15:38

Luke

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Using AVAudioPlayer in iOS5?

2 Answers2