UIImageView - distort so that center grows

I am not a graphics expert and I only know how to do basic CoreAnimation.


Anyhow, I would like to take a UIImageView and distort the middle like a mesh warp. I have searched stack overflow and elsewhere and many of the links I found were 404ed. Does anyone have any good tutorials or links to look at? This isn't that important that I need to spend a week on, but its more of a flair I would like to add to an existing animation. Nice, but not crucial.

UIImageView - distort so that center grows
 
 
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