A Swift extension of UIView to display a curved view

CurvedUIView.swift

import UIKit


extension UIView {
  
  
  /* Usage Example 
   * bgView.addBottomRoundedEdge(desiredCurve: 1.5)
   */
    func addBottomRoundedEdge(desiredCurve: CGFloat?) {
        let offset: CGFloat = self.frame.width / desiredCurve!
        let bounds: CGRect = self.bounds
        
        let rectBounds: CGRect = CGRect(x: bounds.origin.x, y: bounds.origin.y, width: bounds.size.width, height: bounds.size.height / 2)
        let rectPath: UIBezierPath = UIBezierPath(rect: rectBounds)
        let ovalBounds: CGRect = CGRect(x: bounds.origin.x - offset / 2, y: bounds.origin.y, width: bounds.size.width + offset, height: bounds.size.height)
        let ovalPath: UIBezierPath = UIBezierPath(ovalIn: ovalBounds)
        rectPath.append(ovalPath)
        
        // Create the shape layer and set its path
        let maskLayer: CAShapeLayer = CAShapeLayer()
        maskLayer.frame = bounds
        maskLayer.path = rectPath.cgPath
        
        // Set the newly created shape layer as the mask for the view's layer
        self.layer.mask = maskLayer
    }
}