How do you hide the tab bar when a view controller is shown?
Simply, Go to ViewController (in StoryBoard) -> Attribute inspector -> Under 'View Controller' section select 'Hide Bottom Bar on Push' checkbox.
How do you use tab bar?
The tab bar interface displays tabs at the bottom of the window for selecting between the different modes and for displaying the views for that mode. This class is generally used as-is, but may also be subclassed. Each tab of a tab bar controller interface is associated with a custom view controller.