AVAudioPlayer 泄漏？答案

【问题标题】：AVAudioPlayer leaks?AVAudioPlayer 泄漏？
【发布时间】：2023-11-25 03:06:01
【问题描述】：

我遇到了问题，不知道如何处理。想要构建一个有声音和动画的应用程序。它给了我一个 1 级然后是 2 级的内存警告。我已经尝试构建和分析，我得到了所有这些潜在的泄漏。如果我释放音频，声音将不会播放。有什么提示吗？

这是代码的一部分和我得到的泄漏

    - (IBAction)playsound2
    {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"cat" ofType:@"mp3"];
        AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]; 
        *- **Method returns an Objective-C object with a +1 retain count (owning reference)***
        theAudio.delegate = self;
        [theAudio play];

        ***-  Object allocated on line 302 and stored into 'theAudio' is no longer referenced after this point and has a retain count of +1 (object leaked)***


        cat1.hidden = 0;
        cat.hidden = 1;
        [cat1 startAnimating];
        cat.center = cat1.center;
        [self performSelector:@selector(loadAnimations) withObject:nil afterDelay:1.0];
        catLabel.hidden = 0;
    }

【问题讨论】：

标签： iphone objective-c ios xcode avaudioplayer

【解决方案1】：

Here 是迄今为止提出的相同问题的解决方案。

    - (AVAudioPlayer *)audioPlayerWithContentsOfFile:(NSString *)path {
        NSData *audioData = [NSData dataWithContentsOfFile:path];
        AVAudioPlayer *player = [AVAudioPlayer alloc];
        if([player initWithData:audioData error:NULL]) {
            [player autorelease];
        } else {
            [player release];
            player = nil;
        }
        return player;
    }

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【讨论】：

【解决方案2】：

您必须为 AVAudioPlayer 类实例声明一个实例变量。

//Instance variable:
{
    AVAudioPlayer* theAudio;
}

- (IBAction)playsound2
{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"cat" ofType:@"mp3"];
    if (!theAudio ) {
        theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]; 
        if (theAudio ) {
            theAudio.delegate = self;
            [theAudio play];
        }
    }

    cat1.hidden = 0;
    cat.hidden = 1;
    [cat1 startAnimating];
    cat.center = cat1.center;
    [self performSelector:@selector(loadAnimations) withObject:nil afterDelay:1.0];
    catLabel.hidden = 0;
}

【讨论】：