A ‘tab bar’ is commonly found in most iOS apps and is used to present distinct views in each tab.

To create a tab bar controller using the interface builder, drag a tab bar Controller from the Object Library into the canvas.

http://i.stack.imgur.com/IEtwo.png

By default a tab bar controller comes with two views. To add additional views, control drag from the tab bar controller to the new view and select ‘view controllers’ in the segue-drop down.

http://i.stack.imgur.com/u1dHd.png