Swift Swift: Using The Navigation Bar Title and Back button.

[Updated for Xcode 7.2/Swift 2.1 2/5/16] Note: Click here for the  Swift 3.0/Xcode 8 version of this tutorial  In writing the Swift Swift View Controllers book, it came to my attention many people don't understand the functionality of the navigation toolbar's title and Back button. In an early part of writing, I planned to skip …