In this section we are going to create a new view controller that will enable the application to authenticate users against the Facebook Platform.
Starting from our previous project, we are going to add a new view controller that will contain UI elements and logic to handle the authentication flow.
LBViewController of the application, add a new button on the right-bottom position, and set the label as
Go Social, as displayed in the following screenshot. This button will prompt the Facebook view controller and will enable users to use the Platform.