UIView+CornerRadius(Stroyboard)

import UIKit

extension UIView {

@IBInspectable var cornerRadius: CGFloat {
    get {
        return layer.cornerRadius
    }
    // also  set(newValue)
    set {
        layer.cornerRadius = newValue
    }
}

@IBInspectable var masksToBounds: Bool {
    get {
        return layer.masksToBounds
    }
    set {
        layer.masksToBounds = true
    }
}

}