Ios – Modal segue, navigation bar disappears

This has been classified as "works as intended" by Apple engineers. I filed a bug for this a while back. Their reasoning is that the user is often going to be entering data in a modal form so they are trying to be "helpful" and keep the keyboard visible where ordinarily various transitions within the modal view can cause the keyboard to show/hide repeatedly.

edit: here is the response of an Apple engineer on the developer forums:

Was your view by any chance presented with the UIModalPresentationFormSheet style? To avoid frequent in-and-out animations, the keyboard will sometimes remain on-screen even when there is no first responder. This is not a bug.

This is giving a lot of people problems (myself included) but at the moment there doesn't seem to be a way to work around it.

UPDATE:

In iOS 4.3 and later, you can now implement `-disablesAutomaticKeyboardDismissal' on your view controller to return NO:

- (BOOL)disablesAutomaticKeyboardDismissal {
    return NO;
}

This fixes the issue.

If your deployment target is iOS 5.0 or later, use this message:

[self dismissViewControllerAnimated:YES completion:nil];

Or in Swift:

self.dismissViewControllerAnimated(true, completion: nil)

If your deployment target is older, use this (deprecated) message:

[self dismissModalViewControllerAnimated:YES];