iPhone开发中使用AVAudioPlayer出现内存泄漏的解决办法

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最近在使用AVAudioPlayer播放音频时，发现有内存泄漏的现象，我的代码如下：

-(id)init{    if (self = [super init]) {        NSString *path = [[NSBundle mainBundle] pathForResource:@"GameOver" ofType:@"mp3"];        NSError *error = nil;        audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:&error];        audioPlayer.delegate = self;        [audioPlayer prepareToPlay];        audioPlayer.numberOfLoops = -1;        [audioPlayer play];    }        return self;}

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-(void)dealloc{    if (audioPlayer && [audioPlayer isPlaying]) {        [audioPlayer stop];    }        [audioPlayer release];    audioPlayer = nil;    [super dealloc];}

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跟踪Instruments工具中的泄漏情况，发现都是在NSURL或NSData泄漏了，在stackoverflow发现有人这么说（帖子：http://stackoverflow.com/questions/12498015/leak-from-nsurl-and-avaudioplayer-using-arc）：

Looks to be a leak in Apple's code... I tried using both

• -[AVAudioPlayer initWithData:error:]?and
• -[AVAudioPlayer initWithContentsOfURL:error:]
  In the first case, the allocated?AVAudioPlayer?instance retains the passed in?NSData. In the second, the passed in?NSURL?is retained:
  也就是说使用AVAudioPlayer播放音频时，NSData或NSURL被retain了，所以，我在dealloc方法中将其release，内存泄漏就解决了：
  
  

  -(void)dealloc{    [audioPlayer.url release];        if (audioPlayer && [audioPlayer isPlaying]) {        [audioPlayer stop];    }        [audioPlayer release];    audioPlayer = nil;    [super dealloc];}

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