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POIOS - playing mp3 fails when moved to a separate class
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  1. POIOS - playing mp3 fails when moved to a separate class
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    copied!<p>I successfully played an mp3 file within the body of a class. However, when I move the functionality out to a separate class, it fails. </p> <p>Here's the working code: </p> <p>Header: </p> <pre><code>#import &lt;AVFoundation/AVFoundation.h&gt; @interface QuestionController : UIViewController &lt;UITableViewDataSource, UITableViewDelegate, UISplitViewControllerDelegate&gt; { AVAudioPlayer *audioPlayer; } </code></pre> <p>working code: </p> <pre><code>NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/A.mp3", [[NSBundle mainBundle] resourcePath]]]; NSError *error; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&amp;error]; audioPlayer.numberOfLoops = 0; if (audioPlayer == nil) NSLog(@"audio errror: %@",[error description]); else [audioPlayer play]; </code></pre> <p>Here's the new class:</p> <p>Header:</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import &lt;AVFoundation/AVFoundation.h&gt; @interface AudioPlayer : NSObject { } - (void *) playAudioFile:(NSString *) mp3File; @end </code></pre> <p>implementation: </p> <pre><code> #import "AudioPlayer.h" @implementation AudioPlayer - (void *) playAudioFile:(NSString *) mp3File { NSLog(@"mp3file to play: %@", mp3File ); NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@", mp3File, [[NSBundle mainBundle] resourcePath]]]; NSError *error; AVAudioPlayer *audioPlayer; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&amp;error]; audioPlayer.numberOfLoops = 0; if (audioPlayer == nil) { NSLog(@"audio errror: %@",[error description]); } else { [audioPlayer play]; } [audioPlayer release]; return 0; } @end </code></pre> <p>Here's the calling code:</p> <pre><code> AudioPlayer *audioPlayer = [[AudioPlayer alloc] init]; [audioPlayer playAudioFile:@"/A.mp3"]; </code></pre> <p>However, when it runs in the separate class, it doesn't successfully create the player and goes to the "audio player == nil" branch </p> <p>Here's the output:</p> <pre><code>012-07-21 07:14:54.480 MyQuiz[6655:207] mp3file to play: /A.mp3 2012-07-21 07:15:40.827 MyQuiz[6655:207] audio errror: Error Domain=NSOSStatusErrorDomain Code=-43 "The operation couldn’t be completed. (OSStatus error -43.)" </code></pre> <p>The url is "file://localhost/A.mp3"</p> <p>Any ideas what I'm doing wrong? I somehow have always have trouble when I'm refactoring to separate methods. It's frustrating. </p>
 

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