AVAudioPlayer不釋放內存

Question

我初始化一個ivar AVAudioPlayer變量，播放和嘗試釋放它的內存。釋放行後，它不會設置爲0x0。在零線之後，它不會更改爲0x0。 AVAudioPlayer是否需要特殊的東西來釋放它的內存？

audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource: @"mysound" ofType: @"aif" inDirectory:@"/"]] error: &err]; 
audioPlayer.numberOfLoops = 0; 
audioPlayer.volume = .5; 
[audioPlayer prepareToPlay]; 
[audioPlayer play]; 
[audioPlayer release]; 
audioPlayer = nil; 

Answer 1

好，

AVAudioPLayer異步播放音頻文件。開始播放後，您不應釋放播放器，否則可能會導致與內存有關的錯誤，並且您的音頻文件可能無法播放。

你應該通過avaudioplayerdelegate釋放玩家。欲瞭解更多詳情，你可以檢查這個answer too。

希望這會有所幫助。

謝謝，

Madhup

Answer 2

- (IBAction) playaction { 

     NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"songname" ofType:@"mp3"]; 
     NSURL *newURL = [[NSURL alloc] initFileURLWithPath: soundFilePath]; 
     self.soundFileURL = newURL; 
     [newURL release]; 
     [[AVAudioSession sharedInstance] setDelegate: self]; 
     [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryAmbient error: nil]; 

    // Registers the audio route change listener callback function 
    AudioSessionAddPropertyListener (
            kAudioSessionProperty_AudioRouteChange, 
            audioRouteChangeListenerCallback, 
            self 
            ); 

    // Activates the audio session. 

    NSError *activationError = nil; 
    [[AVAudioSession sharedInstance] setActive: YES error: &activationError]; 

    AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: soundFileURL error: nil]; 
    self.appSoundPlayer = newPlayer; 
    [newPlayer release]; 
    [appSoundPlayer prepareToPlay]; 
    [appSoundPlayer setVolume: 1.0]; 
    [appSoundPlayer setDelegate: self]; 
    [appSoundPlayer play]; 

} 

這裏，appSoundPlayer被聲明在頭文件作爲

AVAudioPlayer *appSoundPlayer; 

據屬性聲明併合成，也在dealloc方法釋放爲

[appSoundPlayer release];