How do I make an expand/contract transition between views on iOS?

Question

I\'m trying to make a transition animation in iOS where a view or view controller appears to expand to fill the whole screen, then contract back to its former position when done

Answer 1

After watching the Youtube iPad animation, I figured out that it's just an illusion. Let's say that there's a SearchViewController for the search results, and a DetailViewController for the video itself, and the additional info of the video.

DetailViewController has a method like - (id)initWithFullscreen which starts the view controller using the full screen space with the video.

So the sequence goes like this:

1. SearchViewController presents its results.
2. User clicks on a video.
3. DetailViewController is created with initWithFullscreen, but not presented
4. The "Zoom in" animation begins. (Notice that we are still on the SearchViewController, and this animation is just a simple View animation)
5. The "Zoom in" animation ends, presents the DetailViewController with animated:NO (as Anomie mentioned).
6. The DetailViewController is now presented, and using full space.

It doesn't seem that the youtube app is doing anything fancier, the give-away was that the "Zoom in" animation zooms to a black square, before presenting the full video.