[問題] 關於avplayer loading 問題

[herbacin (herbacin)]

請問一下 最近碰到avplayer loading時機的問題, 目前想做到當在進行

緩衝的時候, 顯示loading的動畫

目前看到的做法是註冊監聽

self.playerItem?.addObserver(self, forKeyPath: "playbackBufferEmpty", options: .new, context: nil)

self.playerItem?.addObserver(self, forKeyPath: "playbackLikelyToKeepUp", options: .new, context: nil)

self.playerItem?.addObserver(self, forKeyPath: "playbackBufferFull", options: .new, context: nil)

override func observeValue()
if keyPath == "playbackBufferEmpty" {
     if let item = playerItem {
           if item.isPlaybackBufferEmpty {
               self.download.startAnimating()
           }
      }
} else if keyPath == "playbackLikelyToKeepUp" {
     if let item = playerItem {
           if item.isPlaybackLikelyToKeepUp {
                self.download.stopAnimating()
           }
     }
} else if keyPath == "playbackBufferFull" {
      if let item = playerItem {
            if item.isPlaybackBufferFull {
                self.download.stopAnimating()
            }
      }
}

但是發現 loading 動畫停止的時候 並不會 馬上播放, 要等好幾秒

要怎麼才能做到當loading動畫停止"馬上"播放

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