//
//  TitleButton.swift


import UIKit

class TitleButton: UIButton {

    override init(frame: CGRect) {
        super.init(frame: frame)

        setTitleColor(UIColor.darkGrayColor(), forState: UIControlState.Normal)
        setImage(UIImage(named: "navigationbar_arrow_down"), forState: UIControlState.Normal
 
)
        setImage(UIImage(named: "navigationbar_arrow_up"), forState: UIControlState.Highlighted)
        sizeToFit()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    /**
     這個方法裡調整佈局
     */
    override func layoutSubviews() {
        super.layoutSubviews
 
()

        titleLabel?.frame.origin.x = 0
        imageView?.frame.origin.x = titleLabel!.frame.size.width
    }
}

2.使用

 let titleBtn = TitleButton()