import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

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

        //定义一个视频文件路径
        let filePath = Bundle.main.path(forResource: "b", ofType: "mp4")
        let videoURL = URL(fileURLWithPath: filePath!)
        //定义一个playerItem，并监听相关的通知
        let playerItem = AVPlayerItem(url: videoURL)
        NotificationCenter.default.addObserver(self,
                           selector: #selector(playerDidFinishPlaying),
                           name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
                           object: playerItem)
        //定义一个视频播放器，通过playerItem径初始化
        let player = AVPlayer(playerItem: playerItem)
        //设置大小和位置（全屏）
        let playerLayer = AVPlayerLayer(player: player)
        playerLayer.frame = self.view.bounds
        //添加到界面上
        self.view.layer.addSublayer(playerLayer)
        //开始播放
        player.play()
    }

    //视频播放完毕响应
    @objc func playerDidFinishPlaying() {
        print("播放完毕!")
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}Copy