下載文件導致問題在ios中流式傳輸

我正在使用AVPlayer在我的應用&中正常播放。下載文件導致問題在ios中流式傳輸

但是，當我嘗試使用Alamofire.downlaod method下載某個文件時，流將停止工作。

AVPlayer的rate屬性爲自動爲零。

我覺得線程可能存在一些問題，但我沒有得到它。

我的代碼如下

override func viewDidLoad() { 

play_Live_Stream() 
} 


override func viewWillAppear() { 

Download_favourite_files() 
} 

func Download_favourite_files() { 
    for int i in arr_favourites{ 
      Alamofire.download(urlString, to: destination).response { response in 
         print(response) 
      } 
     } 

    } 

func play_Live_Stream(){ 
myplayerItem = AVPlayerItem(url: url as! URL) 
     myPlayer = AVPlayer(playerItem: myplayerItem) 
     myPlayer.volume = volume_slider.value 
     PlayerObserving = true 
     NotificationCenter.default.addObserver(self, selector: #selector(playInstalled(noti:)), name: NSNotification.Name.AVPlayerItemPlaybackStalled, object: myPlayer.currentItem) 
     NotificationCenter.default.addObserver(self, selector: #selector(playfailed(noti:)), name: NSNotification.Name.AVPlayerItemFailedToPlayToEndTime, object: myPlayer.currentItem) 
     myPlayer.currentItem?.addObserver(self, forKeyPath: "status", options: NSKeyValueObservingOptions.new, context: nil) 
     myPlayer.currentItem?.addObserver(self, forKeyPath: "timedMetadata", options: [.new,.old,.initial], context: nil) 
     myPlayer.currentItem?.addObserver(self, forKeyPath: "playbackLikelyToKeepUp", options: .new, context: nil) 

} 

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) { 

     if ((object! as AnyObject).isEqual(myPlayer.currentItem) && keyPath=="status"){ 
      if myPlayer.status == AVPlayerStatus.readyToPlay{ 
       print("ReadyToPlay") 

       myPlayer.play() 
      } 
    }

TRY 2（默認NSURLSession）

func load_downloads(){ 
for track in arr_tracks{ 

       let urlString = BASE_URL + "/track/download/" + "\(track.id)" 
       print("downloaded url",urlString) 
       let url = NSURL(string: urlString) 
       let downloadTask = backgroundSession.downloadTask(with: url as! URL) 
       downloadTask.resume() 
      } 
     } 


func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) { 

     let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] 
     let destinationURLForFile = documentsURL.appendingPathComponent((downloadTask.originalRequest?.url?.lastPathComponent)! + "_" + (downloadTask.response?.suggestedFilename)!) 

     let fileManager = FileManager() 

     if fileManager.fileExists(atPath: destinationURLForFile.path){ 
     } 
     else{ 
      do { 
       try fileManager.moveItem(at: location as URL, to: destinationURLForFile as URL) 
      }catch{ 
       print("An error occurred while moving file to destination url") 
      } 
     } 

    }

但它並沒有給我爲什麼流停止任何信息。我也觀察失速&失敗的信息，如果有的話。

來源

2016-10-12 user2526811

你能展示'play_Live_Stream'的實現嗎？ –

@RhythmicFistman，我添加了播放流的代碼。 – user2526811

一次下載多少個文件？不要一次啓動所有下載，您可以嘗試一次下載一個嗎？也許你正在飽和你的連接。你是否觀察到'playbackLikelyToKeepUp'的任何改變？ –

嘗試在主線程上播放流。

DispatchQueue.main.async { [unowned self] 
self.play_Live_Stream() 
}

來源

2016-10-12 10:29:12

感謝您的回答..我嘗試過，但仍然沒有工作... – user2526811

嘗試在主線程上播放流。

DispatchQueue.main.async { 
for int i in arr_favourites{ 
    Alamofire.download(urlString, to: destination).response { response in 
     print(response) 
    } 
    } 
}

來源

2016-10-18 12:27:36 Wos

我已經嘗試作爲以前的答案，但仍然不工作！ – user2526811

下載文件導致問題在ios中流式傳輸

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