ScheduleTimer.swift

class TimerTestViewController: UIViewController {
  
        override func viewDidLoad() {
                super.viewDidLoad()

                Timer.scheduledTimer(timeInterval: interval, target: self,
                                     selector: #selector(ViewController.methodToRepeat(timer:)),
                                     userInfo: nil, repeats: true)
        }

        @objc func methodToRepeat(timer : Timer) {
                // code here
        }
  
}