在以下情况下出现MemoryLeak问题 [英] MemoryLeak problem in following case

问题描述

单击播放按钮时出现内存泄漏....

I am getting a memory leak when i click the play button....

我正在模拟器上运行和性能工具" ...下使用泄漏"工具进行测试

I am testing with that "Leak" tool under "Run and performance tool"....on simulator

当我第一次单击播放按钮时，我正在泄漏....

I am getting that leak when i click the play button first time.....

这是我的代码....

-(IBAction)play
{


    [self setPlayer];
    [self playme];  
}



-(IBAction)stop
{
    [self stopme];
    [self releasePlayer];

}


-(void)setPlayer
{

    NSURL *file = [[NSURL alloc] initFileURLWithPath:
                   [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"shut up.mp3"]];
    NSError *err = nil;
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:file error:&err];

    [file release];
    player.numberOfLoops = -1;
    [player prepareToPlay];
    player.volume=1.0;


}


-(void)playme
{
    if (!isPlaying)
    {
        [player play];
        isPlaying=YES;
    }
}


-(void)stopme
{
    if (isPlaying)
    {
        [player stop];
        isPlaying=NO;
    }
}

-(void)releasePlayer
{
    if(!isPlaying)
    {
        [player release];
        player=nil;
    }
    isPlaying=NO;
}

推荐答案

我认为，以下语句是内存泄漏的根源，

I think, the below statement is the source of memory leak,

player = [[AVAudioPlayer alloc] initWithContentsOfURL:file error:&err];

以下是讨论相同问题的SO帖子.

Here is the SO posts which has discussed the same issue.

AVAudioPlayer内存泄漏

AVAudioPlayer内存泄漏

AVAudioPlayer内存泄漏-媒体播放器框架

这是博客文章

AVAudioPlayer内存泄漏

已编辑

根据博客教程，您的代码必须如下所示.

As per the blog tutorial your code must be look like below.

-(void)setPlayer
{

    NSURL *file = [[NSURL alloc] initFileURLWithPath:
                   [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"shut up.mp3"]];
    NSError *err = nil;

    NSData *data = [NSData dataWithContentsOfFile:file];
    AVAudioPlayer *player = [AVAudioPlayer alloc];    
    if([player initWithData:audioData error:NULL])
     {

        player.numberOfLoops = -1;
        [player prepareToPlay];
        player.volume=1.0;
        [player autorelease];
    } 
    else 
    {
        [player release];
        player = nil;
    }
    [file release];
}

无泄漏版本存储alloc返回的指针，而不是initWithData:error:返回的指针.这样，无论发生什么情况，播放器仍然可以释放.

The leak-free version stores the pointer returned by alloc, rather than the pointer returned by initWithData:error:. That way, whatever happens, the player can still be released.

这篇关于在以下情况下出现MemoryLeak问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！