how Marquee text of label on swift?

Question

I want to create a marquee label in Swift. I tried some codes but could not get it to work.

I also can do this with animation but I have problem with repeating it.

Answer 1

check this code

var check = true
    var speed = 2
    var stopWidth = 200.0
override func viewDidLoad() {
        label.center.x = view.center.x // Place it in the center x of the view.
        label.center.x -= view.bounds.width // Place it on the left of the view with the width = the       
 Timer.scheduledTimer(timeInterval: TimeInterval(speed),
                             target: self,
                             selector: #selector(selectCityViewController.sliderAnimationTime),
                             userInfo: nil,
                             repeats: true)


    }

    @objc func sliderAnimationTime() {
        // do what should happen when timer triggers an event
        UIView.animate(withDuration: TimeInterval(speed), delay: 0, options: [.curveEaseOut], animations: {
            if self.check {
                self.check = false
                self.label.center.x -= self.view.bounds.width - CGFloat(self.stopWidth)
                self.view.layoutIfNeeded()
            }else{
                self.check = true
                self.label.center.x += self.view.bounds.width - CGFloat(self.stopWidth)
                self.view.layoutIfNeeded()
            }

        }, completion: nil)
    }