Animate intrinsicContentSize changes

Question

I have a UIView subclass that draws a circle whose radius changes (with nice bouncy animations). The view is deciding the size of the circle.

I want this UIView subclass

Answer 1

Well for Swift 4/3 this works and I think this is best practise. If you have a UIView with a UILabel in it and the UIView adapts the frame from the UILabel, use this:

self.theUILabel.text = "text update"
UIView.animate(withDuration: 5.0, animations: {
   self.theUIView.layoutIfNeeded()
})

The normal self.view.layoutIfNeeded() will work most of the time as well.