If you're trying to position the title to the left and the icon to the right inside a UIButton

JustifiedButton.swift

import UIKit

class WorkoutButton: UIButton {

    override func imageRectForContentRect(contentRect: CGRect) -> CGRect {
        var imageFrame = super.imageRectForContentRect(contentRect)
        imageFrame.origin.x = CGRectGetMaxX(contentRect) - CGRectGetWidth(imageFrame)
        return imageFrame
    }
    
    override func titleRectForContentRect(contentRect: CGRect) -> CGRect {
        var titleFrame = super.titleRectForContentRect(contentRect)
        if (self.currentImage != nil) {
            titleFrame.origin.x = CGRectGetMinX(super.imageRectForContentRect(contentRect))
        }
        return titleFrame
    }
}