我如何将这四行代码从 AVAudioPlayer 转换为 AVPlayer？

Question

我需要将我的代码从 AVAudioPlayer 更改为 AVPlayer，因为它支持倒带，而 AVAudioPlayer 不支持。我在使用这四行代码寻找正在使用滑块播放的音频时遇到了问题。这是我的代码：

func changeAudioTime() {

    //musicPlayer is declared as AVAudioPlayer and I want to change it to  AVPlayer and I named the variable player

    musicPlayer.prepareToPlay()
    musicPlayer.currentTime = NSTimeInterval(slider.value)
    musicPlayer.numberOfLoops = -1
    slider.value = Float(musicPlayer.currentTime)

}

Answer 1

要在这两种情况下设置时间，您可以使用：

self.player.seekToTime(CMTimeMake(Int64(slider.value),1))
slider.value = Float(CMTimeGetSeconds(self.player.currentTime()))

循环可以这样试，因为没有直接循环的方法，直到你想重复你可以设置flag/observer然后重复这首歌如果重复关闭你可以不执行observer/seek

NSNotificationCenter.defaultCenter().addObserver(self,
selector: "playerItemDidReachEnd:",name: AVPlayerItemDidPlayToEndTimeNotification,
object: self.player.currentItem)

func playerItemDidReachEnd(notification: NSNotification) {
    self.player.seekToTime(kCMTimeZero)
    self.player.play()
}

我如何将这四行代码从 AVAudioPlayer 转换为 AVPlayer？

How would I convert these four lines of code from AVAudioPlayer to AVPlayer?

ios

xcode

swift

swift2

avplayer