Animation when adding view. Where should view come from, NIB or programmatic?

FROM : David
DATE : Thu Mar 20 20:53:04 2008

I think this is a basic question.In interface builder you can specify
animations which occur when adding a view. Question is, where does the view
typical come from? It seems desirable to be able to design a potentially
complex view in IB, obtain a reference to it and use it for animations. Or
is it assumed that you're programmatically creating the view?

I've been trying to find similar examples to popup windows and found some
discussions stating that you can't find a window in the nib and that you
should have a separate NIB per window.