ios - AVPlayer seekToTime : backward not working

Question

我有以下代码:

AVPlayerItem *currentItem = [AVPlayerItem playerItemWithURL:soundURL];
[self.audioPlayer replaceCurrentItemWithPlayerItem:currentItem];
[self.audioPlayer play];

其中 soundURL 是一个 remoteURL。它工作正常。 AVPlayer 完美播放音乐。我有一个进度条，我正在根据玩家的当前时间更新它。

一切正常。我的问题是，当我向前拖动进度条时，audioplayer 从新位置开始，但如果我拖动 progressbar 它不会从新位置开始，实际上它会恢复从以前的位置。这是我的进度条拖动开始和停止代码:

- (IBAction)progressBarDraggingStart:(id)sender
{
     if (self.audioPlayer.rate != 0.0)
     {
          [self.audioPlayer pause];
     }
}

- (IBAction)progressBarDraggindStop:(id)sender
{
     CMTime newTime = CMTimeMakeWithSeconds(self.progressBar.value, 1);
     [self.audioPlayer seekToTime:newTime];
     [self.audioPlayer play];
}

谁能帮我解决这个问题？

Answer 1

我建议做几件事。首先，获取 timescale 值并将其传递给 CMTime 结构。其次，使用 seekToTime:toleranceBefore:toleranceAfter:completionHandler: 方法进行更准确的查找。例如，您的代码如下所示:

- (IBAction)progressBarDraggindStop:(id)sender {
    int32_t timeScale = self.audioPlayer.currentItem.asset.duration.timescale;

    [self.audioPlayer seekToTime: CMTimeMakeWithSeconds(self.progressBar.value, timeScale)
                 toleranceBefore: kCMTimeZero
                  toleranceAfter: kCMTimeZero
               completionHandler: ^(BOOL finished) {
                   [self.audioPlayer play];
               }];
}