Swift -使用UIImage动画呈现/关闭ViewController

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建UIImage数组，包含所有动画帧
        let frame1 = UIImage(named: "frame1")
        let frame2 = UIImage(named: "frame2")
        let frame3 = UIImage(named: "frame3")
        let frame4 = UIImage(named: "frame4")
        let animationFrames = [frame1, frame2, frame3, frame4].compactMap { $0 }
        
        // 创建UIImageView来显示动画
        let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
        imageView.animationImages = animationFrames
        imageView.animationDuration = 1.0 // 动画持续时间
        imageView.startAnimating() // 开始动画
        
        // 将UIImageView添加到ViewController的视图中
        view.addSubview(imageView)
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        // 执行关闭动画
        UIView.animate(withDuration: 0.5, animations: {
            self.view.alpha = 0
        }) { _ in
            self.view.removeFromSuperview()
        }
    }
}