swift绘制圆角加阴影

class MineTopView: UIView {
    
    override func draw(_ rect: CGRect) {
        //避免重复绘制
        layer.sublayers?.forEach({ obj in
            if obj.isKind(of: CAGradientLayer.self) {
                obj.removeFromSuperlayer()
            }
        })
        let gradient = CAGradientLayer()
        gradient.colors = [UIColor(red: 0.12, green: 0.61, blue: 0.93, alpha: 1).cgColor, UIColor(red: 0, green: 0.91, blue: 1, alpha: 1).cgColor]
        gradient.frame = self.bounds
        gradient.startPoint = CGPoint(x: 0, y: 0)
        gradient.endPoint = CGPoint(x: 1, y: 0)
        gradient.shadowColor = UIColor(red: 0.8, green: 0.8, blue: 0.8, alpha: 0.5).cgColor
        gradient.shadowOffset = CGSize(width: 0, height: 0)
        gradient.shadowOpacity = 0.8
        gradient.shadowRadius = 10
        gradient.cornerRadius = 8
        layer.insertSublayer(gradient, at: 0)
        
    }
    
}