iOS6中的AudioToolBox泄漏？ [英] AudioToolBox leak in iOS6?

问题描述

当我使用AudioToolBox播放音乐时，内存会大量泄漏。

When I use AudioToolBox for playing music, memory leaks heavily.

AVAudioPlayer *newMusicPlayer = [[AVAudioPlayer alloc] initWithData:data error:&error];

我使用此代码播放音乐。在iOS5和iOS4中，它可以正常工作。但在iOS6中，如果数据大小为5M，则所有5M都泄露。我无法在仪器中看到泄漏信息。

I use this code to play music. In iOS5 and iOS4, it works properly. But in iOS6, if data's size is 5M, all of the 5M leaked. And I can't see leak info in Instruments.

有没有人有同样的问题？任何建议都将不胜感激。

Is there anybody have the same problem? Any suggestion will be grateful.

此处的所有音频代码（使用ARC）：

All my audio code here(Using ARC):

@implementation ViewController
{
    AVAudioPlayer *_player;
}

- (void)play
{
    if (_player)
    {
        [_player stop];
        _player = nil;
    }

    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"test.app/1.mp3"];
    NSData *musicData = [[NSData alloc] initWithContentsOfFile:path];
    AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithData:musicData error:nil];
    player.volume = 1;
    if (player)
    {
        _player = player;
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(100, 100, 100, 100);
    [button setTitle:@"play" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(play) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
}

@end

推荐答案

我正在使用 AVAudioPlayer 从文件播放音频，并发现iOS模拟器始终泄漏内存，但设备没有。这是使用仪器验证的。这是ARC代码。

I'm playing audio from a file using AVAudioPlayer, and found that the iOS simulator consistently leaks memory, but the device doesn't. This was verified using Instruments. This is ARC code.

我的播放器声明如下：

@property (nonatomic, retain) AVAudioPlayer *numberPlayer;

并合成如下：

@synthesize numberPlayer = _numberPlayer;

因为我需要播放几种不同的声音， AVAudioPlayer 创建后无法重置为播放不同的音频文件，我每次都会创建一个新的播放器，如下所示：

Since I need to play several different sounds, and AVAudioPlayer cannot be reset to play a different audio file after its creation, I'm creating a new player every time, like this:

NSString *audioFilePathName = [NSString stringWithFormat:@"Voices/%@/%03i.m4a", self.voiceName, self.theNumber];
NSURL *url = [NSURL fileURLWithPath:BUNDLE_FULL_PATH(audioFilePathName)];
self.numberPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
self.numberPlayer.numberOfLoops = 0;
[self.numberPlayer setCurrentTime:0.0];
[self.numberPlayer setDelegate:self];
[self.numberPlayer prepareToPlay];
[self.numberPlayer play];

在我的委托中，我将播放器设置为 nil 当它完成播放时：

In my delegate I set the player to nil when it has finished playing:

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
    if (player == self.numberPlayer) {
        _numberPlayer = nil;
    }
}

在模拟器中，两者都是 AudioSessionDevice 和 UISoundNewDevice 泄漏内存。然而，最大的泄密者实际上是 NSURL 。设备上不会发生这些泄漏。这种行为在iOS 6中没有改变，但我确实将我的项目部署设置为5.0，这应该有所不同。

In the simulator, both AudioSessionDevice and UISoundNewDevice leak memory. However, the biggest leaker is actually NSURL. None of these leaks occur on the device. This behavior has not changed in iOS 6, but I do have my project deployment set to 5.0, should that make any difference.

另请参阅https://stackoverflow.com/questions/3433487/avaudioplayer-leak-in-simulator 和 AudioToolbox库AVAudioPlayer中的内存泄漏。

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