RubyMotion

Adding a New UIViewController

As the name suggests, UIViewControllers are objects that control a view. The UIViewController object stores the UIView it manages inside the view attribute. However, we generally don’t use addSubview: to add this particular view to the screen; instead, various methods will often take the entire UIViewController object and adjust the view as necessary before adding it to a hierarchy.

Let’s get started with a small project to see how UIViewController works, and you’ll see what I mean. We’ll create an app showing different ways to explore colors, specifically, motion create ColorViewer.

First we make the ./app/controllers directory (mkdir ./app/controllers). This is where we’ll keep all of our controller classes. ...