Animate UIView width does not work

Question

Try to animate the width of a UIView like this. But it does not do anything. Why? The commented part changes alpha of the view, and that works.

UIView.animate(withDuration: 1, delay: 0, options: [.curveEaseInOut], animations: {

    self.constraintLookupWidth.constant = 300
    self.viewLookup.setNeedsLayout()
    //self.viewLookup.alpha = 0.2

}, completion: {complete in

    self.constraintLookupWidth.constant = 200
    self.viewLookup.setNeedsLayout()
    //self.viewLookup.alpha = 1.0
})

http://stackoverflow.com/questions/36953508/animate-view-height-with-swift/36953518#36953518 — Bhavin Bhadani, Jan 25 '17 at 09:23

score 0 · Answer 1 · answered Jan 25 '17 at 09:22

0

I guess that you need to integrate the call with a layoutIfNeeded(), this ask auto layout to force the layout right now.

answered Jan 25 '17 at 09:22

Andrea

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Animate UIView width does not work

1 Answers1