这是关于UIButton的使用，将介绍一些button的属性，里面的代码我会把注释全部去掉，你可能连起来看会出错，但是单独看一个一个属性或者方法是没有问题的

import Foundation
import UIKit
class CreateButton: UIButton {

    var target:ViewController?
     init(target:ViewController) {
        super.init(frame:CGRectZero)
        self.target? = target
    }


    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    func createButton() ->UIButton {
        //有+按钮
        let button = UIButton(type:.ContactAdd)
       button.frame = CGRectMake(, , , )
        //定制按钮
        let button = UIButton(frame: CGRectMake(,,,))
        button.setTitle("普通按钮", forState: .Normal)
        button.setTitle("选中按钮", forState: .Selected)
        button.setTitle("高亮按钮", forState: .Highlighted)
        button.setTitle("禁用按钮", forState: .Disabled)
        //允许点击
        button.enabled = true
        //文字颜色
        button.setTitleColor(UIColor.yellowColor(), forState:.Normal)
        //按钮图片
       button.setImage(UIImage(named: "price_list_bg"), forState: .Normal)
        //禁用按钮不变暗
        button.adjustsImageWhenDisabled = false
        //点击按钮不变暗
        button.adjustsImageWhenHighlighted = false
        //背景颜色
        button.backgroundColor = UIColor.blueColor()
        //背景图片
        button.setBackgroundImage(UIImage(named: "price_list_bg"), forState: .Normal)
        //点击事件没有点击对像  button.addTarget(self.target,action:Selector("click"),forControlEvents:.TouchUpInside)
        //点击事件有点击对象
       button.addTarget(self.target,action: Selector("tap:"), forControlEvents: .TouchUpInside)
        return button
    }


    deinit {
        print("button结束")
    }

}

然后我们看看按钮的使用：

import UIKit

class ViewController: UIViewController,UITextFieldDelegate{

    var createText:CreateTextField?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        //按钮
        let button = CreateButton.init(target: self).createButton()

        createText = CreateTextField.init()
        createText?.delegate = self
        self.view.addSubview(CreateLabel().createLabel())
        self.view.addSubview(button)
        self.view.addSubview(createText!)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    //按钮的点击事件
    func click() {
        print("按钮被点击了")
    }
    //按钮的点击事件
    func tap(button:UIButton) {
        print(button.titleForState(button.state))
    }

    }

就是这样了，直接通过初始化方法创建一个按钮