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以上可以仅使用 AVFoundation.framework 完成吗？

我试着做一些实验，但我真的不能让它工作

（对不起新手，请告诉我将代码放在哪里，例如：ViewController 或 MainView）

这些是我的代码，（UI 组件在里面，因为我不想使用界面生成器）

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        NSError *error;
        buttonPlay = [[UILabel alloc] initWithFrame:CGRectMake(0, 350, 100, 50)];

        buttonPlay.text = @"Play";

        // Get the file path to the song to play.
        NSString* path;
        NSURL* url;

        path = [[NSBundle mainBundle] pathForResource:@"Bring_Me_To_Life.mp3" ofType:nil];
        url = [NSURL fileURLWithPath:path];

        NSData *_objectData = [NSData dataWithContentsOfURL:url];

        //Initialize the AVAudioPlayer.
        audioPlayer = [[AVAudioPlayer alloc] initWithData:_objectData error:&error];

        // Preloads the buffer and prepares the audio for playing.
        audioPlayer.numberOfLoops = 0;
        audioPlayer.volume = 1.0f;
        [audioPlayer prepareToPlay];

        if (audioPlayer == nil)
            NSLog(@"%@", [error description]);
        else
            [audioPlayer play];

        [self addSubview:buttonPlay];
    }
    return self;
}

-(void)touchesBegan:(CGPoint)location{
    if(CGRectContainsPoint(buttonPlay.frame, location)){
        NSLog(@"Dec from Chl %f",[audioPlayer peakPowerForChannel:0]);
        NSLog(@"Length of Clip %f",[audioPlayer duration]);
    }
}
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1 回答 1

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试试这个 audioPlayer=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil];

于 2012-07-05T09:47:10.983 回答