View size reduces after hiding tab bar

Question

In my iPhone app.

I am using UINavigationControllers in UITabBarController.

Like:

Tab Bar:

• Navigation Controller.

  • View Controller1.

• Navigation Controller.

  • View Controller2.

---

View Controllerx from any of above view controllers.

When I navigates to the View Controllerx.

I am hiding the tab bar.

The problem is that tab bar is hiding but view size reduces. And white space appears at bottom.

[self.tabBarController.tabBar setHidden:YES];
[self.tabBarController.tabBar setFrame:CGRectZero];
[self.navigationController pushViewController:obj_tipcalc animated:YES];
[obj_tipcalc release];

Thanks.

Answer 1

Your navigation controller's view lies within the view of your UITabBarController and it's not filling the entire screen. Simply try to resize it:

 ...
 CGRect biggerFrame = tabBarController.view.frame;
 biggerFrame.size.height += tabBarController.tabBar.frame.size.height;
 tabBarController.view.frame = biggerFrame ;
 ...

To bring back the original layout:

...
CGRect smallerFrame = tabBarController.view.frame;
smallerFrame.size.height -= tabBarController.tabBar.frame.size.height;
tabBarController.view.frame = smallerFrame;
...