[SWIFT] UIButton 아이콘 하단 텍스트 표시

import UIKit

extension UIButton {
    func alignTextBelow(spacing: CGFloat = 4.0) {
        guard let image = self.imageView?.image else {
            return
        }
        
        guard let titleLabel = self.titleLabel else {
            return
        }
        
        guard let titleText = titleLabel.text else {
            return
        }
        
        let titleSize = titleText.size(withAttributes: [
            NSAttributedString.Key.font: titleLabel.font as Any
        ])
        
        titleEdgeInsets = UIEdgeInsets(top: spacing, left: -image.size.width, bottom: -image.size.height, right: 0)
        imageEdgeInsets = UIEdgeInsets(top: -(titleSize.height + spacing), left: 0, bottom: 0, right: -titleSize.width)
    }
}