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POAVAudioPlayer not playing any sound
 

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    <p>I'm working on an iOS application that needs to play some sounds using the <code>AVFoundation</code> framework. The workspace structure in Xcode 4 contains two projects:</p> <ul> <li>Workspace <ul> <li>The application itself (main project)</li> <li>A utility library</li> </ul></li> </ul> <p>After building the utility library, it results in a static library which is used in the main application as a framework.</p> <p>So, when trying to play a sound inside the main application by using the code below, it works as expected.</p> <pre><code>NSString *resourcePath = [[NSBundle mainBundle] resourcePath]; NSString *path = [NSString stringWithFormat:@"%@/sound.mp3", resourcePath]; NSURL *url = [NSURL fileURLWithPath:path]; NSError *error = nil; AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&amp;error]; [audioPlayer play]; </code></pre> <p>In contrast, when trying to play exactly the same sound (or any other) inside the utility library using the same code as above, no sound is played at all, even though error is <em>nil</em> and the <em>audioPlayer</em> property values are the right ones (number of channels, duration).</p> <p>I've made sure the <code>AVFoundation</code> framework is in both projects.</p> <p>Also, my class uses the <code>AVAudioPlayerDelegate</code> protocol and implements these two methods:</p> <pre><code>- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag; - (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error; </code></pre> <p>None of these methods is called after trying to play the sound.</p> <p>If I use the <code>AudioToolbox</code> framework instead, then it plays the sound. But I'm interested in using <code>AVFoundation</code> for several reasons.</p> <p>Any idea of what is going on? Am I missing something about <code>AVFoundation</code>? Could it be related to using <code>AVAudioPlayer</code> from inside a static library?</p> <p>Thanks in advance.</p>
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    1. COCan you tell us what the error variable outputs? The one from here AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
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    2. CO@Maudicus, as I said, error is nil after playing the sound. I found the solution and it's related to something I didn't mention and didn't think about: I'm compiling with ARC. ARC inserts a release call to the audio player, so it's deallocated right after leaving the method where it is created, as explained [here](http://stackoverflow.com/questions/7692866/avaudioplayer-stops-playing-immediately-with-arc)
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    3. COI'm sorry I had copied your code and it worked. Missed your statement about error being nil. I'm glad it's resolved
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