Rounded Corners only on Top of a UIView

Question

Hi i am searching a clean solution without overwriting drawRect or stuff like that to create a UIView with Rounded corners on the Top of the

Answer 1

An extension for UIView that rounds selected corners (Swift 4):

extension UIView {

    /// Round UIView selected corners
    ///
    /// - Parameters:
    ///   - corners: selected corners to round
    ///   - radius: round amount
    func roundCorners(_ corners: UIRectCorner, radius: CGFloat) {
        let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
        let mask = CAShapeLayer()
        mask.path = path.cgPath
        self.layer.mask = mask
    }
}

example:

ratingView.roundCorners([.topLeft, .topRight, .bottomRight], radius: 6)