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