iphone - 使用相同的按钮播放/暂停 [AVAudioPlayer]

Question

如何通过按一次 UIbutton 使用 IBAction 播放声音，并使用 AVAudioPlayer 再次按下按钮暂停它？此外，我想在播放声音和不播放声音时更改 UIButton 的状态。

这是我的代码:

- (IBAction)Beat
{
    if ([Media2 isPlaying])
    {
        [Media2 pause];
        [Button17 setSelected:NO];
    }

    else
    {
        Path = [[NSBundle mainBundle] pathForResource:@"Beat" ofType:@"mp3"];
        AVAudioPlayer *Media2 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:Path] error:NULL];
        [Media2 setDelegate:self];
        [Media2 play];
        [Button17 setSelected:YES];
    }
}

Answer 1

这是使用 BOOL 变量的简单方法。

在viewDidLoad中设置playing = NO。

-(void)PlayStop{    
    if (playing==NO) {
        // Init audio with playback capability
        [play setBackgroundImage:[UIImage imageNamed:@"hmpause.png"] forState:UIControlStateNormal];

        AVAudioSession *audioSession = [AVAudioSession sharedInstance];
        [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

        audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:______ error:&err];
        [audioPlayer prepareToPlay];

        audioPlayer.delegate=self;
        [audioPlayer play];

        playing=YES;
    }
    else if(playing==YES){
        [play setBackgroundImage:[UIImage imageNamed:@"Audioplay.png"] forState:UIControlStateNormal];

        [audioPlayer pause];

        playing=NO;
    }
}