设置按钮类型

问题描述

我正在以编程方式创建一个按钮，我想知道如何设置该按钮的 UIButtonType.

I am creating a button programatically and I would like to know how to set that button's UIButtonType.

这就是我创建按钮的方式:

This is how I am creating my button:

let headerPlusButon:UIButton = UIButton(frame: CGRectMake(5, tableView.frame.width - 30, 20, 20))
headerPlusButon.addTarget(self, action: "paymentAddButtonTapped", forControlEvents:.TouchUpInside)

没有像更改标题文本那样的setButtonTypeFor..."方法，显然这不起作用:

There is no "setButtonTypeFor..." method like how you would change the title's text and obviously this doesn't work:

headerPlusButon.buttonType = UIButtonType.ContactAdd

推荐答案

override func viewDidLoad() {

    super.viewDidLoad()

    let button   = UIButton.buttonWithType(UIButtonType.System) as UIButton
    button.frame = CGRectMake(100, 100, 100, 50)
    button.backgroundColor = UIColor.greenColor()
    button.setTitle("Test Button", forState: UIControlState.Normal)
    button.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)

    self.view.addSubview(button)
}  

func buttonAction(sender:UIButton!)
{
    println("Button tapped")
}

从 swift 2 用下面的行替换 UIButton 声明.

from swift 2 replace UIButton declaration with below line.

let button = UIButton(type: .System) as UIButton

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