iphone - 无法启动音频播放器

Question

我有一个音频播放器，但无法播放声音，有人知道为什么吗？
而且我已经导入了AVFoundationFramework.h

这是代码:

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.


    NSURL* musicFile = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"begin" ofType:@"mp3"]];
    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
    [audioPlayer play];
    audioPlayer.numberOfLoops=-1;
}

Answer 1

添加代表:

 [audioPlayer setDelegate:self];

并确保正确设置音量。