objective-c - AVAudioPlayer 导致 ARC 下的泄漏

Question

我有一个类提供音乐播放器，在 ARC 下编译。这是初始化代码：

- (id) init{
  self = [super init];
  runningVolumeNotification = FALSE;

  MPMusicPlayerController *musicPlayer = [MPMusicPlayerController iPodMusicPlayer];
  systemVolume = musicPlayer.volume;

  NSString *myExamplePath = [[NSBundle mainBundle] pathForResource:@"servo" ofType:@"mp3"];
  AVAudioPlayer* p = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:myExamplePath] error:NULL];
  [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil];
  [p prepareToPlay];
  [p stop];

  return self;

}

Instruments 报告线路 100% 泄漏：

AVAudioPlayer* p = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:myExamplePath] error:NULL];

我不知道问题出在哪里！