将Swift与AVPlayer一起使用，如何通过代码添加和删除video？

我是Swift的新手，我正在尝试将video添加到视图中，然后在调度“stopScreenSaver”通知时将其删除。 除了当我去除video层（playerLayer.removeFromSuperlayer（））时，一切似乎都运行良好。

任何指导将不胜感激。 我觉得我在这里缺少一些添加和删除图层的基本概念！

import UIKit import AVFoundation import QuartzCore import CoreMedia class ViewController: UIViewController { let contentURL = NSBundle.mainBundle().URLForResource("testvideo", withExtension: "mp4") var player = AVPlayer() var playerLayer = AVPlayerLayer() let screenSize : CGRect = UIScreen.mainScreen().bounds override func viewDidLoad() { super.viewDidLoad() // Used for starting and stopping the videos related to the screen saver NSNotificationCenter.defaultCenter().addObserver(self, selector: "playScreenSaver:", name: "playScreenSaverID", object: nil) NSNotificationCenter.defaultCenter().addObserver(self, selector: "stopScreenSaver:", name: "stopScreenSaverID", object: nil) } override func viewDidAppear(animated: Bool) { // Player player = AVPlayer(URL: contentURL!) // Layer for display… Video plays at the full size of the iPad playerLayer = AVPlayerLayer(player: player) var view = UIView(frame: CGRectMake(0, 0, screenSize.width, screenSize.height)) self.view.layer.addSublayer(playerLayer) playerLayer.frame = view.bounds } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } func playScreenSaver(notification: NSNotification){ print("play") dispatch_async(dispatch_get_main_queue()) { self.view.layer.addSublayer(self.playerLayer!) self.player!.play() } } func stopScreenSaver(notification: NSNotification){ print("pause") dispatch_async(dispatch_get_main_queue()) { self.player!.pause() self.playerLayer!.removeFromSuperlayer() } } } 

Answer 1

使用调度修复了我遇到的问题。

 dispatch_async(dispatch_get_main_queue()) { self.player!.pause() self.playerLayer!.removeFromSuperlayer() }