Apply round corner/s on UIView, you can apply round corner to any side of UIView

UIViewExtension+RoundCorners.swift

    func roundCorners(corners: UIRectCorner, radius: CGFloat) 
    {
        let size = CGSize(width: radius, height: radius)
        
        let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: size)
        let mask = CAShapeLayer()
        mask.path = path.cgPath
        self.layer.mask = mask
    }