I'm sure this is a basic question but I have to ask it anyways:
Why is the top nav bar on iPhone apps (the nav bar on the top that has a back button, title, right button, etc) only available when the window is a child of a tab?
I want to have the top nav bar present but I don't want or need a tab group, as it would have only one tab anyways.
I dealt with the same problem. Don't waste your time fighting it. Simply hide the tabGroup even if you end up having just one tab and you'll get what you want and no tabBar will be shown.
You can use a navigation group to create the effect you're looking for - here's an example from the iPad Kitchen Sink that will also do the trick on iPhone.