Dismiss modalviewcontroller with a page curl

In iOS4:

To present, it's something like:

[containerView addSubview:modelView];[UIView transitionWithView:containerView                  duration:.75                   UIViewAnimationOptionTransitionCurlUp                animations:^{}                completion:^(BOOL finished) {                    NSLog(@"finished %d", finished);                }];

To dismiss, use UIViewAnimationOptionTransitionCurlDown.

Your setAnimationTransition: shouldn't be forView:modelView; it should be for the parentView.

[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:containerView cache:NO];

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html

If you want to change the appearance of a view during a transition—for example, flip from one view to another—then use a container view, an instance of UIView, as follows:

• Begin an animation block.
• Set the transition on the container view.
• Remove the subview from the container view.
• Add the new subview to the container view.
• Commit the animation block.

Use of this method is discouraged in iOS 4.0 and later. You should use the block-based animation methods instead.