- (void) flipView {
	[UIView beginAnimations:nil context:NULL];
	[UIView setAnimationDuration:kTransitionDuration];
		
	[UIView setAnimationTransition:([mainView superview] ?
				UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromRight)
				forView:self.view cache:YES];
	
	if ([flipView superview])
	{
		[flipView removeFromSuperview];
		[self.view addSubview:mainView];
	}
	else
	{
		[mainView removeFromSuperview];
		[self.view addSubview:flipView];
	}
		
	[UIView commitAnimations];
}

the controllers view is setup s.t. it adds the mainView as a subview to its default view in the init method

flipping a view on the iphone sdk

iphone

Objective C