How do I animate a NSLayoutConstraint in Swift?

Question

I would like to animate an UIImageView. I declared a NSLayoutConstraint in viewDidLoad and used this code:

UIView.animate(withDurat         


        

Answer 1

Please set your constraint in viewDidAppear and try below correction

myConstant = 100
myConstraint.constant = myConstant
UIView.animateWithDuration(1, animations: {
self.view.layoutIfNeeded()
}, completion: {finished in })