Q: iOS : HMGLTransition Effects I would be grateful if someone help to implement the HMGLTransition effects 
here is my code :
 [[HMGLTransitionManager sharedTransitionManager] setTransition:transition];
        Book2 *bookView = [[[Book2 alloc] init] autorelease];
        [[HMGLTransitionManager sharedTransitionManager] presentModalViewController:bookView onViewController:self];
        [bookView release]; 

I need goto another view with FlipTransition , but my app will be freezed !
is this api PRIVATE or PUBLIC ? 

A: HMGLTransitionManager is a 3rd party library.  It uses OpenGL to render its animations.  
For a simple flip animation it might be best to use the standard apple stuff.  Try using the modal's view flip.  
