title: Add an activity indicator to tab bar
body: <p>I am using story boards and came accross this problem. I need to add an activity indicator to a tab bar which has a table view and map view. So basically till it finds the current location i want the activity indicator to run. I did this using storyboards by adding a viewcontroller before the tabbed bar but nothing happens after it finishes. So i'd like to know how you add an activity indicator to a tabbed bar application and once activity finishes to load the tabbed bar. </p>