是否可以制作三角形UIView？

import UIKit

class TriangleView: UIView {

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = UIColor.clear
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func draw(_ rect: CGRect) {
        super.draw(rect)

        let trianglePath = UIBezierPath()
        trianglePath.move(to: CGPoint(x: rect.width / 2, y: 0))
        trianglePath.addLine(to: CGPoint(x: 0, y: rect.height))
        trianglePath.addLine(to: CGPoint(x: rect.width, y: rect.height))
        trianglePath.close()

        UIColor.blue.setFill()
        trianglePath.fill()
    }
}

let triangleView = TriangleView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
view.addSubview(triangleView)