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POProblems with AVAudioPlayer
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copied!<p>I'm new to the iPhone-Development. </p> <p>I want to play a Sound when an UIButton is tapped. I tried the following:</p> <p>ViewController.h:</p> <pre><code>@interface JahrenzeitenViewController : UIViewController <AVAudioPlayerDelegate> { UIButton *button_PlaySound; AVAudioPlayer *audioPlayer; } @property (nonatomic, retain) IBOutlet UIButton *button_PlaySound; </code></pre> <p>ViewController.m</p> <pre><code>- (IBAction)playSound { //[audioPlayer release]; //audioPlayer = nil; NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"wav"]; NSURL *audioFileURL = [NSURL fileURLWithPath:audioFilePath]; NSError *error = nil; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:&error]; [audioPlayer setDelegate:self]; [audioPlayer prepareToPlay]; [audioPlayer play]; if (audioPlayer == nil) NSLog(@"Error playing sound. %@", [error description]); else [audioPlayer play]; </code></pre> <p>If I try to run the App, I get the following error:</p> <blockquote> <p>Undefined symbols for architecture i386: "_OBJC_CLASS_$_AVAudioPlayer", referenced from: objc-class-ref in JahrenzeitenViewController.o ld: symbol(s) not found for architecture i386 collect2: ld returned 1 exit status</p> </blockquote> <p>I also tried to change the Line</p> <pre><code>audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:&error]; </code></pre> <p>to</p> <pre><code>audioPlayer = [audioPlayer initWithContentsOfURL:audioFileURL error:&error]; </code></pre> <p>Then I don't get the error above, but its still not playing and i get the DebugMessage from my NSLog in the "playSound"-Method:</p> <blockquote> <p>Error playing sound. (NULL)</p> </blockquote> <p>I hope you can help me. Thank you in advance :)</p>

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