在无按钮的View Controller上自动播放视频

import AVFoundation
import AVKit

class ViewController: UIViewController {
    var player: AVPlayer?
    var playerLayer: AVPlayerLayer?

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 视频文件的URL
        let videoURL = URL(string: "https://example.com/video.mp4")
        
        // 创建AVPlayer对象
        player = AVPlayer(url: videoURL!)
        
        // 创建AVPlayerLayer对象
        playerLayer = AVPlayerLayer(player: player)
        
        // 设置AVPlayerLayer的frame
        playerLayer?.frame = view.bounds
        
        // 将AVPlayerLayer添加到视图层级中
        view.layer.addSublayer(playerLayer!)
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        // 开始播放视频
        player?.play()
    }
}