FlippableUIButton.swift

import UIKit

class FlippableUIButton: UIButton
{
    override func awakeFromNib()
    {
        if (Locale.current.isRightToLeft)
        {
            flipAllEdgeInsets()
        }
    }
    
    fileprivate func flipAllEdgeInsets() -> Void
    {
        flip(edgeInsets: &contentEdgeInsets)
        
        flip(edgeInsets: &titleEdgeInsets)
        
        flip(edgeInsets: &imageEdgeInsets)
    }
    
    fileprivate func flip(edgeInsets: inout UIEdgeInsets) -> Void
    {
        let leftEdgeInset = edgeInsets.left
        
        edgeInsets.left = edgeInsets.right
        edgeInsets.right = leftEdgeInset
    }
}