UIButton add padding

First all, I want to create a button that use auto layout and have padding on leading and trailing with title

if a create a button that only 2 constrain(vertical, horizontal constraint depend on super view), the size will auto adjust by title of button,.

for example:

build in simulator , there are no any padding

now you can create a custom class to override intrinsicContentSize , for example create AutoAddPaddingButton class

import Foundation
import UIKit
class AutoAddPaddingButtton : UIButton
{
    override var intrinsicContentSize: CGSize {
       get {
           let baseSize = super.intrinsicContentSize
           return CGSize(width: baseSize.width + 20,//ex: padding 20
                         height: baseSize.height)
           }
    }
}

and set Custom Class in xib/storyboard

result:

great !