1、导航栏按钮

UIBarButtonItem(
    title: "Some Title",style: UIBarButtonItemStyle.Done,target: self,action: "flatButtonPressed:"
)

2、普通按钮

flatButton.addTarget(self,action: "flatButtonPressed:",forControlEvents: UIControlEvents.TouchUpInside)

func flatButtonPressed(sender: AnyObject) {
  NSLog("flatButtonPressed")
}

3、timer

var timer = NSTimer.scheduledTimerWithTimeInterval(1.0,selector: Selector("flatButtonPressed"),userInfo: userInfo,repeats: true) let mainLoop = NSRunLoop.mainRunLoop() //1 mainLoop.addTimer(timer,forMode: NSDefaultRunLoopMode) //2 this two line is optinalfunc flatButtonPressed(timer: NSTimer) { }