UINavigationController for table inside of UITabController - objective-c

Question

my app is built with a UITabController and works as imagined. However, for one of the views within my UITabBar, I would like to add a table that when something is pressed will take me somewhere. And I would like to do this just within this one view.
I know how to build a table and populate and get it to go somewhere but my issue is I can't seem to get my app to run with the table. I feel like my connections are off and specifically with appDelegates. I already had two appDelegate files (.h & .m) before adding the UINavigationController so from here I really don't know what to do. I took apple's simpleTableView tutorial files and copied them over to mine. It still crashes. I even copied there appDelegate files (so now I have 4) but the same deal. This is the error I am getting but in general I just feel lost with the delegates and connections.
2011-12-12 12:08:50.302 TabbedCalculation[68713:207] * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key delegate.'
* Call stack at first throw:
If anyone can offer any help, it would be much appreciated.
Thanks!
P.S. I have changed within the mainWindow.xib of the UITabController to point one of the tabs to the appropriate class and xib file so that is not the issue but I have noticed that many tutorials want within the app delegate this line to the navController:
[window addSubview:[navigationController view]];
but I have already set it to the tabBarController.

Answer 1

Your app can only use one set of app delegate files. So copying over a the example's app delegate files does not mean they are being utilized. You need a navigation controller inside the specific tab you want to contain the tableview. Here is an example of a navigation controller inside a tab bar controller, by modifying didFinishLaunchingWithOptions in the app delegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
AllTaskViewController *view1 = [[AllTaskViewController alloc] initWithNibName:#"AllTaskView" bundle:nil];
view1.title = #"All Tasks";
TodayTaskViewController *view2 = [[TodayTaskViewController alloc] initWithNibName:#"TodayTaskView" bundle:nil];
view2.title = #"Today's Tasks";
HistoryViewController *view3 = [[HistoryViewController alloc] initWithNibName:#"HistoryView" bundle:nil];
view3.title = #"History";
SettingsTableViewController *view4 = [[SettingsTableViewController alloc] initWithNibName:#"SettingsTableView" bundle:nil];
view4.title = #"Settings";
UINavigationController *nav1 = [[UINavigationController alloc] initWithRootViewController:view1];
UINavigationController *nav2 = [[UINavigationController alloc] initWithRootViewController:view2];
UINavigationController *nav3 = [[UINavigationController alloc] initWithRootViewController:view3];
UINavigationController *nav4 = [[UINavigationController alloc] initWithRootViewController:view4];
[view1 release];
[view2 release];
[view3 release];
[view4 release];
self.tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:nav1, nav2, nav3, nav4, nil];
[nav1 release];
[nav2 release];
[nav3 release];
[nav4 release];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
Note: All 4 view controllers have an individual navigation controller, and each one is a custom view controller. I used nibs here, but you don't necessarily have to. And the app itself has no main window, you would need to modify this slightly if you are using a main window for the app.