RubyMotion: A module for the NSCoding protocol

In RubyMotion you can use modules to stop duplicating code for protocols.

E.g.:

class User
  include Serializable
  attr_accessor :id, :name, :email
end

class Session
  include Serializable
  attr_accessor :last_access, :points
end

Gist: https://gist.github.com/4141258