添加委托给AVAudioPlayer原因“_NSAutoreleaseNoPool（）类的对象0x55e060 NSCFString自动释放与地方没有游泳池 - 刚刚泄露”

Question

我一直在使用一个类来播放使用AVAudioPlayer的声音。因为我要释放这些声音，他们的玩法之后，我添加了一个委托。这导致了“_NSAutoreleaseNoPool（）：类NSCFString自动释放与地方没有游泳池的对象0x55e060 - 刚刚泄露”。错误的声音完成播放后的权利，但在此之前我-audioPlayerDidFinishPlaying被称为

下面是一些来源：

@interface MyAVAudioPlayer : NSObject <AVAudioPlayerDelegate> {
    AVAudioPlayer   *player;
    float           savedVolume;
    BOOL            releaseWhenDone;
}

在主类的.m：

- (MyAVAudioPlayer *) initPlayerWithName: (NSString *) name;
{
    NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: name ofType: @"caf"];

    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];

    player = [[AVAudioPlayer alloc] initWithContentsOfURL: fileURL error: nil];
    [fileURL release];
    [player prepareToPlay];
    return (self);
}
- (MyAVAudioPlayer *)getAndPlayAndRelease:(NSString *)name withVolume:(float) vol;
{
    MyAVAudioPlayer *newMyAVPlayer = [self initPlayerWithName:name];
    player.volume = vol;
    [player play];
    releaseWhenDone = YES;
    [player setDelegate: self];
    return newMyAVPlayer;
}   
+ (void) getAndPlayAndReleaseAuto:(NSString *)name withVolume:(float) vol;
{
    MyAVAudioPlayer *newMyAVPlayer = [[MyAVAudioPlayer alloc] getAndPlayAndRelease:name withVolume:vol];
//  [newMyAVPlayer autorelease];
}

#pragma mark -
#pragma mark AVAudioPlayer Delegate Methods

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)playedPlayer successfully:(BOOL)flag {
    if (releaseWhenDone) {
        NSLog(@"releasing");
        [playedPlayer release];
//      [self release];
        NSLog(@"released");
    }
}

- (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error {
    NSLog(@"Error while decoding: %@", [error localizedDescription] );
}

- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player {
    NSLog(@"Interrupted!");
}

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player {
    NSLog(@"EndInterruption!");
}

- (BOOL) play;
{   
    player.currentTime = 0.0;
    return [player play];
}

注释出[播放器setDelegate：自];让错误消失，但后来我audioPlayerDidFinishPlaying不会被调用。

任何想法？我现在会突然在另一个线程中运行？

Answer 1

我发现这个问题。我的错误，当然。

在我的很多的类文件，我加入：

-(BOOL) respondsToSelector:(SEL) aSelector
{
    NSLog(@"Class: %@ subclass of %@, Selector: %@", [self class], [super class], NSStringFromSelector(aSelector));
    return [super respondsToSelector:aSelector];

}

主要出于好奇。

那么，当我添加了一个委托我的声音，那么这个方法被委托之前调用，它会从任何runloop的AVAudioPlayer发生称为是在和可能，与没有autorelease池一runloop。