Create a rectangle with just two rounded corners in swift?

Question

I need to create a rectangle that have just two rounded corners in swift (Objective C code also ok).

At the moment my code is creating two rectangles with

Answer 1

2017...

@IBDesignable
class RoundedEnds: UIView {
    
    override func layoutSubviews() { setup() } // "layoutSubviews" is best
    
    func setup() {
        let r = self.bounds.size.height / 2
        let path = UIBezierPath(roundedRect: self.bounds, cornerRadius:r)
        let mask = CAShapeLayer()
        mask.path = path.cgPath
        self.layer.mask = mask
    }
}

For only some corners, just change to:

roundedRect: self.bounds,
  byRoundingCorners: [.topLeft, .topRight],
  cornerRadii: CGSize(width: r, height: r)

Note that as usual there have been many small changes in Swift, eg capitalization of constants, etc.