If I want to add a function as fast as the timer hits 0. Do anyone have any tips? Here is the Code that I want to implement it in.
class ViewController: UIViewController {
    @IBOutlet weak var Counterlabel: UILabel!
    var Nbr = 51
    var timerValue = 52
    var timer = NSTimer()
    override func viewDidLoad() {
        super.viewDidLoad()
        let timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: Selector("Counter"), userInfo: nil, repeats: true)
    }
    @IBAction func Btn1(sender: AnyObject) {
        Nbr = timerValue - 1
        timerValue = timerValue - 1;
    }
    func Counter(){
        Nbr -= 1
        Counterlabel.text = "\(Nbr)"
    }
}
 
     
     
     
    