trying to animate a constraint in swift

Question

I have a UITextField that I want to enlarge its width when tapped on. I set up the constraints and made sure the constraint on the left has the lower priority t

Answer 1

Watch this.

The video says that you need to just add self.view.layoutIfNeeded() like the following:

UIView.animate(withDuration: 1.0, animations: {
       self.centerX.constant -= 75
       self.view.layoutIfNeeded()
}, completion: nil)