UIButton that resizes to fit its titleLabel

Question

I have a UIButton that I add to my view controller\'s view in a storyboard. I add centering constraints to position it and leading space constraints to limit it

Answer 1

/*
In SWIFT : Create an IBDesignable sub class of UIButton and override the intrinsicContentSize as shown below. It will resize appropriately for text and images. Then change your line break property to Word Wrap. Add a "fixedWidth" inspectable property that will adjust the height if you need buttons with fixed widths or when set to false will adjust the width and keep the height fixed.
*/

import UIKit

@IBDesignable
class UIButtonX: UIButton {
    
    //...

    @IBInspectable var fixedWidth : Bool = true
override var intrinsicContentSize: CGSize {
    let labelSize = titleLabel?.sizeThatFits(CGSize(width: fixedWidth ? frame.width : .greatestFiniteMagnitude, height: fixedWidth ? .greatestFiniteMagnitude : frame.height)) ?? .zero

    let wImage = image(for: [])?.size.width ?? 0
    let wTitleInset = titleEdgeInsets.left + titleEdgeInsets.right
    let wImageInset = imageEdgeInsets.left + imageEdgeInsets.right
    let wContentInset = contentEdgeInsets.left + contentEdgeInsets.right
    let width : CGFloat = labelSize.width + wImage + wTitleInset + wImageInset + wContentInset
    
    let biggerHeight = max(image(for: [])?.size.height ?? 0, labelSize.height)
    let hTitleInset = titleEdgeInsets.top + titleEdgeInsets.bottom
    let hImageInset = imageEdgeInsets.top + imageEdgeInsets.bottom
    let hContentInset = contentEdgeInsets.top + contentEdgeInsets.bottom
    let height : CGFloat = biggerHeight + hTitleInset + hImageInset + hContentInset
    
    let desiredButtonSize = CGSize(width: width, height: height)
    
    return desiredButtonSize
}
    
    //...

}