创建带有透明孔的CAGradient层？

import UIKit
import QuartzCore

func createGradientLayerWithHole() -> CAGradientLayer {
    let gradientLayer = CAGradientLayer()
    gradientLayer.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
    
    let shapeLayer = CAShapeLayer()
    shapeLayer.frame = gradientLayer.bounds
    
    let holePath = UIBezierPath(rect: CGRect(x: 50, y: 50, width: 100, height: 100))
    shapeLayer.path = holePath.cgPath
    
    gradientLayer.mask = shapeLayer
    
    return gradientLayer
}

// 使用示例
let gradientLayer = createGradientLayerWithHole()
view.layer.addSublayer(gradientLayer)