如何在Swift中使用Core animation制作链式动画？

import UIKit
import QuartzCore

class ViewController: UIViewController {

    @IBOutlet weak var animatedView: UIView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建缩放动画
        let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")
        scaleAnimation.fromValue = 1.0
        scaleAnimation.toValue = 1.5
        scaleAnimation.duration = 1.0
        
        // 创建旋转动画
        let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
        rotateAnimation.fromValue = 0
        rotateAnimation.toValue = CGFloat.pi / 2
        rotateAnimation.duration = 1.0
        
        // 设置旋转动画的开始时间，使其在缩放动画之后开始
        rotateAnimation.beginTime = scaleAnimation.duration
        
        // 创建动画组
        let animationGroup = CAAnimationGroup()
        animationGroup.animations = [scaleAnimation, rotateAnimation]
        animationGroup.duration = scaleAnimation.duration + rotateAnimation.duration
        animationGroup.fillMode = .forwards
        animationGroup.isRemovedOnCompletion = false
        
        // 将动画添加到视图的图层
        animatedView.layer.add(animationGroup, forKey: "chainAnimation")
        
        // 更新视图的最终状态
        animatedView.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
        animatedView.transform = animatedView.transform.rotated(by: CGFloat.pi / 2)
    }
}