NSTimer - how to delay in Swift

Question

I have a problem with delaying computer's move in a game.

I've found some solutions but they don't work in my case, e.g.

var delay = NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector: nil, userInfo: nil, repeats: false) 

I tried to use this with function fire but also to no effects.

What other possibilities there are?

Answer 1

Swift 3

With GCD:

let delayInSeconds = 4.0 DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + delayInSeconds) {      // here code perfomed with delay  } 

or with a timer:

func myPerformeCode() {     // here code to perform } let myTimer : Timer = Timer.scheduledTimer(timeInterval: 4, target: self, selector: #selector(self.myPerformeCode), userInfo: nil, repeats: false) 

Swift 2

With GCD:

let seconds = 4.0 let delay = seconds * Double(NSEC_PER_SEC)  // nanoseconds per seconds let dispatchTime = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))  dispatch_after(dispatchTime, dispatch_get_main_queue(), {     // here code perfomed with delay  }) 

or with a timer:

func myPerformeCode(timer : NSTimer) {     // here code to perform } let myTimer : NSTimer = NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector: Selector("myPerformeCode:"), userInfo: nil, repeats: false)