电影完成后关闭 AVPlayer答案

【问题标题】：Close AVPlayer when movie is complete电影完成后关闭 AVPlayer
【发布时间】：2017-02-27 04:40:45
【问题描述】：

我正在制作一个简单的 iPad 应用程序，以便在按下按钮时播放电影。电影播放，当电影完成后，我想关闭 AVPlayerView 以便它返回主屏幕。目前，当视频完成时，它会停留在最后一帧。我现在的 ViewController.Swift。

import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController {
//MARK : Properties 

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}
//MARK: Actions

@IBAction func playButton(_ sender: AnyObject) {

    let movieURL = Bundle.main.url(forResource: "ElephantSeals", withExtension: "mov")!
    let player = AVPlayer(url: movieURL as URL)

    let playerViewController = AVPlayerViewController()

    playerViewController.player = player

    self.present(playerViewController, animated: true) {
        playerViewController.player!.play()
        }
//    player.actionAtItemEnd = playerViewController.dismiss(animated: true)
}
}

如您所见，我认为 actionAtItemEnd 中可能有一些东西，但我不确定如何实现它。谢谢。

【问题讨论】：

标签： ios swift avfoundation avkit

【解决方案1】：

这是 swift 5.3 和 iOS 14.2 中的工作代码，试试这个并告诉我...:)

import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController {
    
    let playerViewController = AVPlayerViewController()
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    @IBAction func playButton(_ sender: AnyObject) {
        
        let movieURL = Bundle.main.url(forResource: "ElephantSeals", withExtension: "mp4")!
        let player = AVPlayer(url: movieURL as URL)
        
        playerViewController.player = player
        NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerViewController.player?.currentItem)
        
        self.present(playerViewController, animated: true) {
            self.playerViewController.player!.play()
        }
    }
    
    
    @objc func playerDidFinishPlaying(note: NSNotification) {
        self.playerViewController.dismiss(animated: true)
    }
}

您可以从这里下载相同的示例项目 https://github.com/deepakiosdev/AVPlayerViewControllerDemo

【讨论】：

非常感谢，很清楚明白了。这对我有用！
当播放器播放完毕时，当前时间不设置为零，如果用户再次尝试播放视频，它将从最后开始。在 player.currentItem 上的 playerDidFinishPlaying 调用 seek(to: CMTime(seconds: 0.0, preferredTimescale: 1) 中。此外，.AVPlayerItemDidPlayToEndTime 通知带有警告“此通知可能发布在与观察者所在的线程不同的线程上已注册。”因此应在主线程上关闭 AVPlayerViewController。

【解决方案2】：

斯威夫特 4

let playerController = AVPlayerViewController()

private func playVideo() {
    guard let path = Bundle.main.path(forResource: "p810", ofType:"mp4") else {
        debugPrint("video.m4v not found")
        return
    }
    let player = AVPlayer(url: URL(fileURLWithPath: path))
    playerController.player = player
    NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerController.player?.currentItem)

    present(playerController, animated: true) {
        player.play()
    }
}

@objc func playerDidFinishPlaying(note: NSNotification) {
    playerController.dismiss(animated: true, completion: nil)
}

【讨论】：

【解决方案3】：

这是客观的c代码

[[NSNotificationCenter defaultCenter] addObserver:self 
selector:@selector(nextVideo:)  name:AVPlayerItemDidPlayToEndTimeNotification object:playerViewController.player.currentItem];

【讨论】：

【解决方案4】：

使用 NSNotificationCenter 你可以做到这一点。

 NotificationCenter.default.addObserver(self, selector: #selector(ViewController.playerDidFinishPlaying), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object:  videoPlayer!.currentItem)

@objc func playerDidFinishPlaying(note: NSNotification) {
    // here you can do your dismiss controller logic
    AVPlayerViewController.dismiss(animated: true)
    print("Video Finished")
}

【讨论】：

Xcode 在这段代码的第一行告诉我两件事：“NSNotificationCenter”已重命名为“NotificationCenter”

【解决方案5】：

调用 AVPlayerViewControllerDelegate。

在 viewDidLoad 中初始化委托并实现该方法

func playerViewControllerDidStopPictureInPicture(AVPlayerViewController) {
      AVPlayerViewController.dismiss(animated: true)
}

https://developer.apple.com/reference/avkit/avplayerviewcontrollerdelegate

【讨论】：

视频正常播放完毕后，不会调用该方法。