Is there a UIView resize event?

Question

I have a view that has rows and columns of imageviews in it.

If this view is resized, I need to rearrange the imageviews positions.

This view is a subview of

Answer 1

If you're in a UIViewController instance, overriding viewDidLayoutSubviews does the trick.

override func viewDidLayoutSubviews() {
    // update subviews
}