来自AVAudioRecorder的泄漏

Question

这是一个看似简单的API。我认为我完全错误地释放了AVAudioRecorder对象，但即使消除了这个问题，我仍然收到了泄漏报告。

下面是我用来处理记录的四种方法：

-(void) startRecording {

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:&err];
[[AVAudioSession sharedInstance] setActive:YES error:nil];

NSError *err;
err = nil;

AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:audioFileURL settings:nil error:&err];

//show user an error on fail
if (!recorder) {
        NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Warning" message:[err localizedDescription] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
        return;
}

[recorder prepareToRecord];
recorder.delegate = self;
recorder.meteringEnabled = NO;

self.isRecording = YES;
[self colorRecordingLight];
[self toggleButtons:3];

[recorder record];

self.audioRecorder = recorder;
[recorder release];

}

-(void) stopRecording {

[audioRecorder stop];
[self cleanupPostRecording];


}

-(void) audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag {

//if this page didn't have audio before, it does now.
self.hasAudio = YES;
[self cleanupPostRecording];

}

-(void) cleanupPostRecording {

[[AVAudioSession sharedInstance] setActive:NO error:nil];

self.isRecording = NO;
[self setAudioRecorder:nil];
[self toggleButtons:4];
[self colorRecordingLight];



}

我得到了多个泄漏(当在设备上运行时)：

Leaked Object   #   Address Size    Responsible Library Responsible Frame
NSCFDictionary      0x16dc20    64  AVFoundation    prepareToRecordQueue(AVAudioRecorder*, AudioRecorderImpl*)
GeneralBlock-32     0x16cf00    32  AVFoundation    prepareToRecordQueue(AVAudioRecorder*, AudioRecorderImpl*)
NSCFNumber      0x160f30    16  Foundation  -[NSPlaceholderNumber initWithUnsignedInteger:]

泄漏告诉我，我正在进行的电话是100%负责的是记录器prepareToRecord；

有没有人看过这个或者能给我一个启示？

Answer 1

我能够消除这个漏洞。

在我最初发布的代码中，我从NSString生成了一个NSURL，并将其存储在一个属性中。

每次我分配一个AVAudioRecorder，我都会直接从属性中传递给它这个NSURL。

通过将我的文件位置存储为NSString实例变量，然后每次从该字符串创建一个新的NSURL，并将这个新的NSURL传递给我新分配的AVAudioRecorder，它就可以工作，并且不会产生这些泄漏。