无法在AVAudioplayer中实现前向动作 [英] Unable to Implement Forward Action in AVAudioplayer

问题描述

我正在使用AVAudioplayer播放一些音频文件。我有一些控制，如前进和后退。

I am using AVAudioplayer to play some audio files. I have some controls like forward and rewind.

倒带工作正常，但前进不是。

Rewind is working properly but forward is not.

- (void)rewind
{
    AVAudioPlayer *player = _rewTimer.userInfo;
    player.currentTime-= SKIP_TIME;
    [_rewTimer invalidate];
    _rewTimer=nil;
    [self updateCurrentTime];
}

- (void)ffwd
{
    AVAudioPlayer *player = _ffwTimer.userInfo;
    player.currentTime-= SKIP_TIME;
    [player setCurrentTime:cTime];
    [_ffwTimer invalidate];
    _ffwTimer=nil;

    [self updateCurrentTime];
}

只要我点击前进按钮，音频文件就会开始播放开始。

As soon as I click on forward button, the audio file just begins playing from the start.

我已经关注了Apple的示例应用程序avTouch。

I have followed the sample app avTouch from Apple.

推荐答案

你可能已经完成了
AVAudioPlayer *播放器的属性声明; h文件中的
也合成了它。
现在转发，只需要，

you might have done the property declaration of AVAudioPlayer *player; in the h file and also synthesised it. Now for forward, just do,

- (void)ffwd
{
    NSTimeInterval *time = [player currentTime];
    time+=SKIP_TIME;
    [player setCurrentTime:time];    

}

做同样的倒带+

OR

 - (void)ffwd{
    NSTimeInterval time = avPlayer.currentTime;
 time+=SKIP_TIME;
    if (time > avPLayer.duration)
    {
       //nothing to do

    }
    else
        [player setCurrentTime:time];
    }

这个似乎是更好的方式，也适用于倒带比较0而不是持续时间

this one seems the better way, also for rewind compare to 0 instead of duration

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