How to Hide Tab Bar Controller?

Try this code:

[self.tabBarController.tabBar setHidden:YES];

where tabbarcontroller is needed to be defined...

EDIT

AppDelegateFileName *appDelegate = (AppDelegateFileName *) [[UIApplication sharedApplication] delegate];
[appDelegate.tabbarController.tabBar setHidden:YES];

before doing this make sure that you create a @property declaration of tabbarController in appDelegate .h file.

If using Storyboards you can simply uncheck a checkbox in your ViewController's Attribute Inspector. It's called "Hide Bottom Bar on Push". Very convenient indeed, and no need to handle the showing of the tabBar again after navigating back from your tabBar-less viewController. I don't know in which XCode-version this was introduced, but it's there for XCode 6 + .