如何使用动画将CAShapelayer从圆形转换为正方形(反之亦然)？

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建CAShapeLayer对象
        let shapeLayer = CAShapeLayer()
        shapeLayer.frame = CGRect(x: 100, y: 100, width: 100, height: 100)
        shapeLayer.fillColor = UIColor.red.cgColor
        
        // 创建圆形和正方形的路径
        let circlePath = UIBezierPath(ovalIn: shapeLayer.bounds)
        let squarePath = UIBezierPath(rect: shapeLayer.bounds)
        
        // 创建动画
        let animation = CABasicAnimation(keyPath: "path")
        animation.duration = 1.0
        animation.fromValue = circlePath.cgPath // 从圆形路径开始
        animation.toValue = squarePath.cgPath // 转换为正方形路径
        
        // 将动画添加到CAShapeLayer
        shapeLayer.add(animation, forKey: "pathAnimation")
        
        // 将CAShapeLayer添加到视图的layer中
        view.layer.addSublayer(shapeLayer)
    }
}