Draw by overriding draw on UIView

Render.swift

import UIKit
import PlaygroundSupport

class Rectangle:UIView{
    
    override func draw(_ rect: CGRect) {
        let path = UIBezierPath(rect: rect)
        path.move(to: CGPoint(x:0,y:rect.height))
        path.addLine(to: CGPoint(x:rect.width/2,y:rect.height/1.4))
        path.addLine(to: CGPoint(x:rect.width,y:rect.height))
        UIColor.red.setStroke()
        path.stroke()
    }
    
}

let rect=Rectangle(frame: CGRect(x: 0, y: 0, width: 100, height: 100))

PlaygroundPage.current.liveView = rect