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POiOS - Attempting to play mp3 file fails
 

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    <p>I'm trying to playback and mp3 file I retrieve from my server from my app doing the following:</p> <pre><code>- (IBAction)play:(UIButton *)sender { dispatch_queue_t downloadQueue = dispatch_queue_create("audio data downloader", NULL); dispatch_async(downloadQueue, ^{ NSURL *audioURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@/%@.mp3", FONYK_FILES_URL, [self.voicenote valueForKeyPath:@"Fonyker.fonykid"], [self.voicenote valueForKeyPath:@"Voicenote.vnid"]]]; NSData *audioData = [NSData dataWithContentsOfURL:audioURL]; dispatch_async(dispatch_get_main_queue(), ^{ NSError *error = nil; AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithData:audioData error:&amp;error]; NSLog(@"%@", error); audioPlayer.delegate = self; [audioPlayer play]; }); }); } </code></pre> <p>The playback fails, meaning no sound is emitted and I get this output when debugging my app step by step:</p> <pre><code>Catchpoint 2 (exception thrown).Single stepping until exit from function __cxa_throw, which has no line number information. </code></pre> <p>And this comes up when I NSLog the error in the simulator:</p> <pre><code>Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn’t be completed. (OSStatus error -50.)" </code></pre> <p>Nothing else shows it just fails, any thoughts?</p> <p><strong>UPDATE:</strong> Modified my code as per J_D's answer and got this in the simulator:</p> <pre><code>Error loading /System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn: dlopen(/System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn, 262): Symbol not found: ___CFObjCIsCollectable Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2012-04-17 15:03:43.054 Fonyk[8238:15307] Error loading /System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn: dlopen(/System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn, 262): Symbol not found: ___CFObjCIsCollectable Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security </code></pre> <p><strong>UPDATE:</strong> the real issue I had was not creating and AVAudioSession instance set to playback in my code, doing so along with the corrections answer I accepted made it work.</p>
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