最近在学习swift的过程中，看到了一些自定义UIButton的例子，再此想和大家分享一下，废话不多说，先看下效果图：

Paste_Image.png

1 自定义Button的titleLabel和imageView的frame属性

class LeftImageRightTextButton: UIButton {
    override init(frame: CGRect) {
        super.init(frame: frame)
        titleLabel?.font = UIFont.systemFontOfSize(15)
        imageView?.contentMode = UIViewContentMode.Center
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        imageView?.frame = CGRectMake(0, (height - (imageView?.size.height)!) * 0.5, (imageView?.size.width)!, (imageView?.size.height)!)
        titleLabel?.frame = CGRectMake((imageView?.size.width)! + 10, 0, width - (imageView?.size.width)! - 10, height)
    }
}

2 对UIView进行扩展

extension UIView {
    /// X值
    var x: CGFloat {
        return self.frame.origin.x
    }
    /// Y值
    var y: CGFloat {
        return self.frame.origin.y
    }
    /// 宽度
    var width: CGFloat {
        return self.frame.size.width
    }
    ///高度
    var height: CGFloat {
        return self.frame.size.height
    }
    var size: CGSize {
        return self.frame.size
    }
    var point: CGPoint {
        return self.frame.origin
    }
}

3 调用方法

class ViewController: UIViewController {
  var manButton = LeftImageRightTextButton()
  private var womenButton: LeftImageRightTextButton?

    override func viewDidLoad() {
        super.viewDidLoad()
        // 注意：这里一定要初始化，否则会报错
         womenButton = LeftImageRightTextButton()
         buildGenderButton(manButton, frame: CGRectMake(50, 50, 100, 50), title: "先生")
         buildGenderButton(womenButton!, frame: CGRectMake(150, 50, 100, 50), title: "女士")
    }

    private func buildGenderButton(button: LeftImageRightTextButton, frame: CGRect, title: String) {
        button.setImage(UIImage(named: "v2_noselected"), forState: UIControlState.Normal)
        button.setImage(UIImage(named: "v2_selected"), forState: UIControlState.Selected)
        button.addTarget(self, action: "genderButtonClick:", forControlEvents: .TouchUpInside)
        button.setTitle(title, forState: UIControlState.Normal)
        button.frame = frame
        button.setTitleColor(UIColor.blackColor(), forState: .Normal)
        view.addSubview(button)
    }
    
    func genderButtonClick(sender: UIButton) {
        print("点击")
        sender.selected = !sender.selected  
    }
}