AVPlayer顯示緩存數據

Question

如何顯示來自AVPlayer的UISlider中的緩存數據？我使用AVPlayer從網絡播放音頻，並且我想顯示下載的數據。

Answer 1

正如評論 - 有一種方法可以從avplayer獲取時間範圍，顯示從遠程URL下載的數據量。

AVPlayer streaming progress

Answer 2

，應該注意的財產loadedTimeRanges您player`s CURRENTITEM。 這樣的：

guard let currentItem = self.player?.currentItem else {return} 
currentItem.addObserver(self, forKeyPath: "loadedTimeRanges", options: NSKeyValueObservingOptions.New, context: nil) 

然後實現以下功能：

observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) { 
    guard object is AVPlayerItem else {return} 
    let item = object as! AVPlayerItem 
    if keyPath == "loadedTimeRanges" { 
     let array = item.loadedTimeRanges 
     guard let timeRange = array.first?.CMTimeRangeValue else {return} 
     let totalBuffer = CMTimeGetSeconds(timeRange.start) + CMTimeGetSeconds(timeRange.duration) 
     tmpTime = CGFloat(tmpTime) 
     print("totalBuffer - \(totalBuffer)") 
     let tmpProgress = tmpTime/playDuration 
     progressCallBack?(tmpProgress: Float(tmpProgress), playProgress: nil) 
    } 
}