Superclass to create rounded UIView (alternative to SmoothedView)

RoundedCorners.swift

//
//  RoundedCorners.swift
//
//  Created by H on 23/02/2020.
//  Copyright © 2020 H. All rights reserved.
//

import UIKit

protocol RoundedCorners {
  var cornerRadius: CGFloat { get set }
  func applyRoundedCorners()
}

extension RoundedCorners where Self: UIView {
  func applyRoundedCorners() {
    let bezierPath = UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius)

    let maskLayer = CAShapeLayer()
    maskLayer.path = bezierPath.cgPath
    layer.mask = maskLayer
  }
}

public class BadgeView: UIView {
    var cornerRadius: CGFloat = 20.0
    
    public override init(frame: CGRect) {
        super.init(frame: frame)
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    
    public override func draw(_ rect: CGRect) {
        applyRoundedCorners()
    }

    override public func layoutSubviews() {
      super.layoutSubviews()

      applyRoundedCorners()
    }
}

extension BadgeView: RoundedCorners { }