带有UIBezierPath - Object的动画固定在左上角

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建一个椭圆路径
        let path = UIBezierPath(ovalIn: CGRect(x: 0, y: 0, width: 100, height: 100))
        
        // 创建一个CAShapeLayer作为动画的目标图层
        let shapeLayer = CAShapeLayer()
        shapeLayer.path = path.cgPath
        shapeLayer.fillColor = UIColor.red.cgColor
        
        // 将CAShapeLayer添加到视图层级中
        view.layer.addSublayer(shapeLayer)
        
        // 创建路径动画
        let animation = CAKeyframeAnimation(keyPath: "position")
        animation.path = path.cgPath
        animation.duration = 2.0
        animation.repeatCount = .infinity
        
        // 将动画添加到目标图层
        shapeLayer.add(animation, forKey: "pathAnimation")
    }
}