iOS: determine when all children have had layoutSubviews called

ios objective-c uiview uiviewcontroller layoutsubviews
Thayne picture Thayne · Dec 24, 2013 · Viewed 8k times · Source

it appears that viewDidLayoutSubviews is called immediately after layoutSubviews is called on a view, before layoutSubviews is called on the subviews of that view. Is there any way of knowing when layoutSubviews has been called on a view and all of its children that also needed their layouts updated?

Answer

Johannes Fahrenkrug picture Johannes Fahrenkrug · Dec 24, 2013

You shouldn't have to know if the subviews of a subview have updated their layout: That sounds like too tight coupling. Also, each subview might handle the arrangement of their respective subviews differently and might not (need to) call layoutSubviews for its subviews at all. You should only ever have to know about your direct subviews. You should treat them more or less as black boxes and not care whether they have subviews of their own or not.

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