Using the Single View Application Template

The easiest way to see how Xcode manages to separate logic from display is to build an application that follows this approach. Apple has included a useful application template in Xcode that quickly sets up a project with a storyboard, an empty view, and an associated view controller. This Single View Application template will be the starting point for many of your projects, so the rest of this hour you learn how to use it.

Implementation Overview

The project we’ll build is simple: Instead of just writing the typical Hello World app, we want to be a bit more flexible. The program presents the user with a field (UITextField) for typing and a button (UIButton). When the user types into the field and presses the button, the display updates an onscreen label (UILabel) so that the word Hello is shown, followed by the user’s input. The completed HelloNoun, as I’ve chosen to call this project, is shown in Figure 6.3.