@selector() in Swift?

Question

I\'m trying to create an NSTimer in Swift but I\'m having some trouble.

NSTimer(timeInterval: 1, target: self, selector: test(), us         


        

Answer 1

you create the Selector like below.
1.

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

2.

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

Take note that the @selector syntax is gone and replaced with a simple String naming the method to call. There’s one area where we can all agree the verbosity got in the way. Of course, if we declared that there is a target method called flatButtonPressed: we better write one:

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

set the timer:

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

In order to be complete, here’s the flatButtonPressed

func flatButtonPressed(timer: NSTimer) {
}