[iPhone] Nesting a UINavigationController in a UITabBar

Some background on my problem:
I looked through the sample code for SimpleDrillDown, which is basically a tutorial for using the Nav controller with UITableViews. So I made my own project, and basically redid what was in the sample. This works fine for me. Basically I have the app delegate, a RootViewController, and a DetailViewController (which acts as the inspector).
In the AppDelegate's applicationDidFinishLaunching: method, it does some basic setup. Creates the RootViewController and adds it to the AddDelegate's ivar of UINavigationController. It then sets the window's subview to be the view of navController. That's basically what the sample does, and same with my own.
Now I'm trying to add a tab bar to my application. I've read the View Controller programming guide, which was pretty straightforward. There is a section for adding NavControllers to a UITabBarController. The instructions read like I expected them too, and seem logical. But I'm having trouble...
So what I did was this.. left my code the way it was, and added a UITabBarController to my AppDelegate. In the applicationDidFinishLaunching: method, I initialized the tabBarController. In the View Controller Programming guide, it then says to set tabBarController.views property to an NSArray of view controllers (one for each tab of the tabBar). Makes sense. So I made an array containing only the navBarController I previously made. I then set this array to the tabBarController.views property. Then I added the tabBarController.view as the window's subview (instead of the navController's view as before).
When I run the application, I get a tabBar visible, but it's completely white, and there is only one, blank tabBarItem in the bar at the bottom. I inspected my code with GDB after I set the tabBarController.view property, and it appears it does not set, as the value in the debugger is 0x0.. The rest of the tabBarController has proper values, but the views array doesn't seem to want to set.
So this is kind of driving me crazy. I hope my explanation made sense (and also wasn't too verbose...heh). If anyone has any ideas please let me know, this is really bugging me!
Thanks again,
JB.

OK. I will try this when I get home, it sounds reasonable.
I've been looking around more and it appears there is an error in the View Controller Programming guide, in the line where I initialize the tabBarController.
In the docs it says something like:
UITabController *tabController = [[UITabController alloc] initWithNibName:nil bundleName:nil];
The solutions I've read sugguest this is an error and instead should just be:
UITabController *tabController = [[UITabController alloc] init];
Again, I will try this out as well when I get home, and report back.
Thanks!

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I am very new to iPhone and Cocoa/Obj-C, but have been working in the .NET world for quite some time building WM apps using the .NET Compact Framework.
Let's say I have an application design that uses a tab view with 3 tabs as its main UI metaphor. In the first 2 tabs, I want to have navigation controllers, and in the last tab I want to have just a simple view.
The first tab is the hardest, since I need the navigation controller to be able to switch out its top-level view between a table view and a graphical representation of the data in the table. This might be a UIWebView, but I don't know that yet. Interacting with either of these top-level views should push onto the navigation controller's stack a new view with some detail information about the list item selected. In the top level view, I need the navigation bar to display a left "refresh" button, a center "segment controller" with 2 segments, and a right "edit" button. The center segment controller will be used to toggle between the base table view and the graphical view. Is there a way to just swap the top level views of a navigation controller? When an item is selected and the detail view is pushed onto the stack, the navigation bar of the detail view needs to change to provide the typical "Back" button and possibly some other right button (to be determined). Is this even possible? Does it have to be done in code, or can I use IB to do it?
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Hiya, I would like to know if there's an example of this anywhere. Basically I would like to push the UITabBar, and keeping with apple's guidelines I can only do this by placing the UITabBar(not the controller) in a viewController. Examples of this are in the Music selection on your iPhone/iTouch when you hit the "Now Playing" nav item, notice the tab bar pushes over.
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Message was edited by: lildragn

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Message was edited by: Lawrence Wang

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Just wanted to add that I've tried this in the simulator and on a provisioned iPod touch, same results on both.
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[iPhone] Nesting a UINavigationController in a UITabBar

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