Swift UIView绘制对角线单边和圆角

import UIKit

class DiagonalCornerView: UIView {
    
    override func draw(_ rect: CGRect) {
        super.draw(rect)
        
        guard let context = UIGraphicsGetCurrentContext() else { return }
        
        // 创建一个路径
        let path = UIBezierPath()
        
        // 移动到左上角
        path.move(to: bounds.origin)
        
        // 添加对角线路径
        path.addLine(to: CGPoint(x: bounds.maxX, y: bounds.maxY))
        
        // 添加圆角路径
        let cornerRadius: CGFloat = 10.0
        path.addArc(withCenter: CGPoint(x: bounds.maxX - cornerRadius, y: bounds.maxY - cornerRadius),
                    radius: cornerRadius,
                    startAngle: 0,
                    endAngle: CGFloat.pi / 2,
                    clockwise: true)
        
        // 设置路径样式
        context.setLineWidth(2.0)
        context.setStrokeColor(UIColor.red.cgColor)
        context.setFillColor(UIColor.blue.cgColor)
        
        // 绘制路径
        context.addPath(path.cgPath)
        context.drawPath(using: .fillStroke)
    }
}