RubyMotion

Where It Begins: AppDelegate

Before we even setup the app in the Rakefile, our app comes with some sensible defaults. Most importantly, it automatically compiles all Ruby files in the app directory of our project. Remember that app_delegaterb we mentioned earlier? It so happens that code was compiled with the app. In fact, it was the only code compiled with our app, so it’s probably a good idea to see what it does.

first_app/HelloMotion/app/app_delegate.rb

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    true
  end
end

Hmm, all that did was define an AppDelegate class with one method. There’s not even a superclass, so how does this do anything at all?

Well, there’s a comment in ...