Question

The main functionality of my app is controlled by a UITabBarController. However, I need to load a View that has a UINavigationController. When I return to my UITabBarController using

        self.tabBarController.selectedViewController = [self.tabBarController.viewControllers objectAtIndex:0];

My UITabBarController no longer responds to clicks. It seems like the View does not have focus.

However, if I use this code to switch back to the UITabBarController:

[window addSubview:tabBarController.view]

My buttons will respond. I feel like “addSubview” is less efficient because I never remove the view from the window and therefore it must be adding a second copy of the view to the stack. Am I correct? Is there a way to use the first method and make my buttons respond? Please let me know.

Answer 1

It sounds like maybe you’re presenting the Nav Controller incorrectly. You definitely shouldn’t be adding views directly to the window. You want to present it using

[myTabBarController presentModalViewController:myNavController animated:YES];

When you’re done with the nav controller you dismiss it with

[myTabBarController dismissModalViewControllerAnimated:YES];

and everything should work.

BTW, this is all documented in the docs for UIViewController and the “View Controller Programming Guide for iPhone OS” document.