由于AVPlayer和观察者未初始化失败而导致的内存泄漏

在10/2020中进行编辑：先前的标题为“未在UIPageViewController的UIViewController中调用Deinitializer”

我想在我的UIViewController（是UIPageViewController的一部分）中使用以下反初始化程序来删除myplayerLayer并将其设置为player，nil以便内存不会过载（因为deinit应该始终调用UIViewController，因为这样就不再需要了） ）：

deinit {
        
    self.player = nil
    self.playerLayer.removeFromSuperlayer()
    print("deinit")
    
}

为了检查是否deinit曾经执行过，我添加了打印件，发现它从未被调用过。有人可以解释为什么不叫它吗？您会建议我做什么来实现自己想做的事情？

编辑：

按照Rob建议的问题中的说明（在注释中），我发现以下函数会导致内存泄漏。如果可以在documents目录中找到文件，则该功能应该设置播放器。

setupPlayer（）函数：

//setup video player
func setupPlayer() {
    
    //get name of file on server //self.video is a String containing the URL for a video on a server
    let fileName = URL(string: self.video!)!.lastPathComponent
    
    let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
    let url = NSURL(fileURLWithPath: path)
    let filePath = url.appendingPathComponent(fileName)?.path
    let fileManager = FileManager.default
    
    if fileManager.fileExists(atPath: filePath!) {
    
        //create file with name on server if not there already
        let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
        if let docDir = paths.first
        {
            
            let appFile  = docDir.appending("/" + fileName)
            let videoFileUrl = URL(fileURLWithPath: appFile)
            
            //player's video
            if self.player == nil {
                
                let playerItemToBePlayed = AVPlayerItem(url: videoFileUrl) //AVPlayerItem(url: videoFileUrl)
                
                self.player = AVPlayer(playerItem: playerItemToBePlayed)
                
                //add sub-layer
                playerLayer = AVPlayerLayer(player: self.player)
                playerLayer.frame = self.view.frame
                self.controlsContainerView.layer.insertSublayer(playerLayer, at: 0)
                
                //when are frames actually rendered (when is video loaded)
                self.player?.addObserver(self, forKeyPath: "currentItem.loadedTimeRanges", options: .new, context:nil)
                
                //loop through video
                NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: self.player?.currentItem, queue: nil, using: { (_) in
                    DispatchQueue.main.async {
                        self.player?.seek(to: kCMTimeZero)
                        self.player?.play()
                    }
                })
                
            }
            
        }
        
    }

}

pageViewController函数（viewcontrollerAfter）

func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? 
{
    
    let currentIndexString  = (viewController as! MyViewController).index
    let currentIndex        = indec.index(of: currentIndexString!)
    
    //set if so that next page
    if currentIndex! < indec.count - 1 {
    
        //template
        let myViewController = MyViewController()
    
        //enter data into template
        myViewController.index            = self.indec[currentIndex! + 1]
    
        //return template with data
        return myViewController
        
    }
    
    return nil
    
}

编辑2：

如您所见，没有回溯，请注意该malloc的大小（右上）和类似的大malloc的大小（左下）。