使用 AVAudioPlayer 发生内存泄漏

Question

我正在使用仪器分析 Objective-C++ 代码中的泄漏，并且得到以下信息：

Leaked Object   Address Size    Responsible Library Responsible Frame
Malloc 32 Bytes,0x8135bc0   32 Bytes    AudioToolbox    SimAggregateDevice::SimAggregateDevice(__CFString const*, __CFString const*, long&)
__NSCFDictionary,0x8135be0  48 Bytes    AudioToolbox    CreateDictionaryForDevice(unsigned long)
Malloc 32 Bytes,0x8135c10   32 Bytes    AudioToolbox    CreateDictionaryForDevice(unsigned long)
Malloc 32 Bytes,0x8135c30   32 Bytes    AudioToolbox    CreateDictionaryForDevice(unsigned long)
Malloc 48 Bytes,0x8135c50   48 Bytes    AudioToolbox    SimAggregateDevice::SimAggregateDevice(__CFString const*, __CFString const*, long&)
__NSCFDictionary,0x813a820  48 Bytes    AudioToolbox    SimAggregateDevice::SimAggregateDevice(__CFString const*, __CFString const*, long&)
__NSCFArray,0x813a850   32 Bytes    AudioToolbox    SimAggregateDevice::SimAggregateDevice(__CFString const*, __CFString const*, long&)
__NSCFDictionary,0x813a870  48 Bytes    AudioToolbox    CreateDictionaryForDevice(unsigned long)
Malloc 32 Bytes,0x813a8a0   32 Bytes    AudioToolbox    SimAggregateDevice::SimAggregateDevice(__CFString const*, __CFString const*, long&)
Malloc 32 Bytes,0x813a8d0   32 Bytes    AudioToolbox    CreateDictionaryForDevice(unsigned long)

我认为这与我编写的在应用程序启动时播放声音的代码有关。 applicationDidFinishLaunching:: 中调用此方法

- (void)playJingle {
    // This is a detached thread so I need a new pool.
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    // This audio player will be released in  audioPlayerDidFinishPlaying.
    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"jingle" ofType:@"m4a"];
    AVAudioPlayer *av = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    [av setDelegate:self];
    [av play];

    // Release.
    [pool release];
}

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer*)av successfully:(BOOL)flag
{
    // Release the AVAudioPlayer.
    [av release];
}

我这样做：在后台线程中的 （使用 PerformSelectorInBackground:withObject: 调用）。我错过了什么吗？为什么我会有这些泄漏？ 谢谢！

Answer 1

您是否尝试过在设备上运行该应用程序？ AVAudioPlayer 在模拟器上进行内存泄漏检测时很容易出现误报...

这是一个非常相似的问题，带有相似的泄漏报告

Answer 2

这是行不通的，您将 AVPlayer 分配给局部变量：

AVAudioPlayer *av = ...

而不是实例变量。

-(void>) playJinlge{
    ...
    self.av = .....
}

-(void) didfinish ... {
   [self.av release];
   self.av=nil;
}