add overlay view over all other views

Question

Hi people,

how do you add an overlay view that goes over everything. eg over a tab bar controller, and a navigation controller?

thanks

Answer 1

Find the "top" view in your stack, and add a subview. eg

[self.tabBarController.view addSubview:myView];

The hardest part is finding the topmost view; with a tab bar, it will be its own view.

Answer 2

Add a window. That's what the popup keyboard and UIAlertView do, you can see that in this view dump.

Answer 3

Use a modal view controller. Have a read of this guide:

http://developer.apple.com/iphone/library/featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html

Presenting the view controller itself is easy:

UINavigationController *navigationController = [[UINavigationController alloc]
                         initWithRootViewController:addController];
[self presentModalViewController:navigationController animated:YES];