This video demonstrates a typical ‘including a third-party library’ workflow with Objective-C/Xcode, where the user has to add the source to the project and assign build settings manually. (Note that this isn’t even a particularly hard example.)
For a demonstration of the same process handled by CocoaPods, see: vimeo.com/63891716.
This video was part of a presentation at the RubyMotion Inspect 2013 conference. The slides can be found here: slideshare.net/alloy020/ruby-motion-inspect-2013-without-notes-18676749.