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我有一个 AVPlayer 的时间观察者，效果很好。我试图让它从音频 0 的持续时间开始倒计时。

它可以工作并且确实倒计时现在我只是在格式化时遇到了一些麻烦。

如果你看到下面的图片，你就会明白我的意思。它从整分钟：秒 3:00 到奇怪的数字 3:-1 等。

在此处输入图像描述 在此处输入图像描述

任何想法我做错了什么？

这是定时器的代码：

let interval = CMTime(value: 1, timescale: 1)
self.audioPlayer?.addPeriodicTimeObserver(forInterval: interval, queue: DispatchQueue.main, using: { (progressTime) in

let secondsProgress = CMTimeGetSeconds(progressTime)

    let secondsStringProgress = String(format: "%02d", Int((secondsProgress.truncatingRemainder(dividingBy: 60))))
    let minuitesStringProgress = String(format: "%02d", Int(secondsProgress) / 60)
    //self.countDownLabel.text = "\(minuitesStringProgress):\(secondsStringProgress)"

    if let duration = self.audioPlayer?.currentItem!.asset.duration {

        let secondsDuration = CMTimeGetSeconds(duration)

            let secondsStringDuration = String(format: "%02d", Int((secondsDuration.truncatingRemainder(dividingBy: 60))))
            let minuitesStringDuration = String(format: "%02d", Int(secondsDuration) / 60)

                let secondsString = String(format: "%02d", Int(secondsStringDuration)! - Int(secondsStringProgress)!)
                let minuitesString = String(format: "%02d", Int(minuitesStringDuration)! - Int(minuitesStringProgress)!)

            self.countDownLabel.isHidden = false
            self.countDownLabel.text = "\(minuitesString):\(secondsString)"

        self.horizontalSlider.value = Float(secondsProgress / secondsDuration)
        self.circleSlider.value = Float(secondsProgress / secondsDuration)

    }
})
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1 回答 1

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我使用这个函数来显示格式化的日期

  func getFormatedTime(FromTime timeDuration:Int) -> String {

    let minutes = Int(timeDuration) / 60 % 60
    let seconds = Int(timeDuration) % 60
    let strDuration = String(format:"%02d:%02d", minutes, seconds)
    return strDuration
  }

像这样使用

        let strDuration = self.getFormatedTime(FromTime: recordingDuration)

或者直接在addPeriodicTimeObserver方法中这样

      recordingDuration = Float(CMTimeGetSeconds((self.playerItem?.asset.duration)!))-Float(CMTimeGetSeconds((self.playerItem?.currentTime())!))

传递它来 getFormatedTime设置返回值的文本

只需两行代码

于 2017-01-21T08:54:47.280 回答