在Swift中创建带有进度条的椭圆

import UIKit

class ViewController: UIViewController {
    var progressView: UIProgressView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建进度条
        progressView = UIProgressView(progressViewStyle: .default)
        progressView.frame = CGRect(x: 50, y: 200, width: 200, height: 20)
        view.addSubview(progressView)
        
        // 创建椭圆路径
        let ovalPath = UIBezierPath(ovalIn: CGRect(x: 50, y: 250, width: 200, height: 100))
        
        // 创建CAShapeLayer
        let shapeLayer = CAShapeLayer()
        shapeLayer.path = ovalPath.cgPath
        shapeLayer.fillColor = UIColor.clear.cgColor
        shapeLayer.strokeColor = UIColor.blue.cgColor
        shapeLayer.lineWidth = 2.0
        
        // 将CAShapeLayer添加到视图
        view.layer.addSublayer(shapeLayer)
        
        // 模拟进度更新
        updateProgress(0.5) // 更新进度为50%
    }
    
    func updateProgress(_ progress: Float) {
        progressView.progress = progress
    }
}