navigation程序中实现view的翻转效果

	[UIView beginAnimations:nil context:NULL];
	[UIView setAnimationDuration: 1];
	[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight 
                                                      forView:self.navigationController.view cache:YES];
	[[self navigationController] pushViewController:objMapView animated:NO];
	[UIView commitAnimations];