ios - 如何使视频播放完毕后消失，以便用户可以继续使用该应用程序？

Question

我编写了一些代码来在启动后播放视频，但是视频播放后，它不会返回 Storyboard，它只是卡在这个循环中，返回主板一秒钟然后黑屏(大概视频结束了)

在调试控制台中显示“2019-05-05 01:32:33.766132+0800 app[35989:1028569] [AVKit] 当全屏 View Controller 转换时，目标 View 应该是我们自己的 View !”

我尝试过一些方法，比如使用一些可以感知视频结束的东西，但这些都没有帮助。

import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController {
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        playVideo()
    }

    let playerController = AVPlayerViewController()

    private func playVideo() {
        guard let path = Bundle.main.path(forResource: "video", ofType:"m4v") 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)
        playerController.showsPlaybackControls = false

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

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

我希望视频在播放完毕后消失，以便用户可以看到应用的主屏幕。

Answer 1

这就是问题

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    playVideo()
}

playerVC 被关闭，之后 vc 出现并调用 viewDidAppear ，因此它将再次显示播放器，考虑一次 bool

var once = true
override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    if once {
      playVideo()
      once = false
    }
}

或者在viewDidLoad中用DispatchAfter显示它