// 创建
let testButton = UIButton()
testButton.frame = CGRectMake(10,100,self.view.frame.width-20,44)
testButton.backgroundColor = UIColor.lightGrayColor()

// 设置倒角等
testButton.layer.cornerRadius = 10
testButton.layer.borderWidth = 1.0
testButton.layer.borderColor = UIColor.redColor().CGColor

// 标题
testButton.setTitle("这是一个按钮",forState: UIControlState.Normal)

// 标题颜色
testButton.setTitleColor(UIColor.redColor(),forState: UIControlState.Normal)

// 触发事件
testButton.addTarget(self,action:"buttonAction",forControlEvents: UIControlEvents.TouchUpInside)

self.view.addSubview(testButton)

触发事件：响应函数

func buttonAction() {
        println("点击...")

    }