fullscreen image pinching ipad

can someone tell me plz if it's possible to use : UIGestureRecognizer on an image in ipad app to switch this image to fullscreen view when pinching in and back to the original size when pinching out? any sample of c开发者_开发技巧ode will be great.

Thanks

To hide navigation bar use -

[[self navigationController ] setNavigationBarHidden:NO animated:NO];

see my this answer to hide tabbar -

How to hide uitabbarcontroller