How to do iPad Photos app pinch to expand

Posted by Macatomy on Stack Overflow See other posts from Stack Overflow or by Macatomy
Published on 2010-06-13T16:49:30Z Indexed on 2010/06/13 16:52 UTC
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Filed under:

objective-c

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cocoa-touch

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ipad

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pinch

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uigesturerecognizer

I don't think this has been asked before on this site, but I might be wrong.

Does anyone know the basics of how to get that whole effect with the iPad Photos app? Basically, pinching a stack of photos lets you have a "peek" at the photos in that stack, which expands based on the distance between your 2 fingers in the pinch, then fully completing the outwards pinch gesture opens the photos in the stack in a new view.

See this video to get what I mean. I know of at least one third party app that uses the same method as the iPad Photo app, so I know it's possible to do. I'm guessing I would do something with UIPinchGestureRecognizer but I'm not sure exactly how to proceed.

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