导航 controller 不显示 iphone

Question

I have an application with a tab bar as the root controller. I have four items in the tabbar. The second item is a table view and this should have a navigation controller of course, the thing is that i don't even get the navigation bar to show up and i have no idea how to do it. So i tried to guess after a long time in google without success. This is what i did in the viewDidLoad method:

SearchNavController *navController = [[SearchNavController alloc]init];

    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:navController];

    [searchNavController release];

With that i got an IlegalArgumentException. How can i get the navigation bar to show up?

Thanks in advance guys

Have a nice day!

Answer 1

Your navController should probably an ordinary UIViewController with the view you want to display. Also you need the following to actually display the navigationController:

[self presentModalViewController:navigationController animated:YES];

The navigation controller should now show up with your view as it's content.

Answer 2

Since you used interface builder to setup your tabbarcontroller. follow the following steps to get navigation bar and navigation controller in your tabbarcontroller:

Open Mainwindow.xib and select tababarcontroller. In the attribute inspector, select the item1 in viewcontroller and from the arrows to the right change it to navigation controller.

Try this link:
link 1

Answer 3

IF you are using interface builder. Then Add UINavigation controller in each tab bar then add your view controller in uinavigation conrtroller. If you have 4 tabs then you have to put 4 navigation controller.

UITabbarcontroller ->>Tab Bar >> UINavigationController >> set its class to your viewcontroller