ios - AVAudioPlayer initWithData 返回零

Question

我使用下面的代码用 NSData 初始化了一个 AVAudioPlayer 对象，它又在我的主包中有一个 mp3 的数据。

NSError *error;
NSString *filePathForBgAudio = [[NSBundle mainBundle] pathForResource:@"beebuzz10" ofType:@"mp3"];
NSData *bgAudioData = [NSData dataWithContentsOfFile:filePathForBgAudio];
bgAudioPlayer = [[AVAudioPlayer alloc] initWithData:bgAudioData error:&error];
bgAudioPlayer.delegate = self;

我已经在 .h 文件中声明了 bgAudioPlayer。但是当我通过设置断点检查时，我发现在这行 bgAudioPlayer = [[AVAudioPlayer alloc] initWithData:bgAudioData error:&error]; 之后 bgAudioPlayer 仍然显示为无。但是 filePathForBgAudio 和 bgAudioData 已正确初始化并具有数据。只有 bgAudioPlayer 是 nil。上面的代码有什么问题？如何纠正这个问题？

Answer 1

- (void)viewDidLoad
{
    [super viewDidLoad];


    NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
                                         pathForResource:@"bubble"
                                         ofType:@"mp3"]];

    NSError *error;
    _audioPlayer = [[AVAudioPlayer alloc]
                    initWithContentsOfURL:url
                    error:&error];
    if (error)
    {
        NSLog(@"Error in audioPlayer: %@",
              [error localizedDescription]);
    } else
    {
        _audioPlayer.delegate = self;
        [_audioPlayer prepareToPlay];

    }
}


- (IBAction)playsound:(id)sender
{

    [_audioPlayer play];

  }