Insert the code in RoundButton class.
import UIKit
@IBDesignable
class RoundButton: UIButton {
@IBInspectable var cornerRadius: CGFloat = 0{
didSet{
self.layer.cornerRadius = cornerRadius
}
}
@IBInspectable var borderWidth: CGFloat = 0{
didSet{
self.layer.borderWidth = borderWidth
}
}
@IBInspectable var borderColor: UIColor = UIColor.clear{
didSet{
self.layer.borderColor = borderColor.cgColor
}
}
}
Refer the image.