Working RestKit Mapping RubyMotion

restkit.rb

class Photo
  attr_accessor :max_id_str

  URL = ""

  def self.load
    manager.loadObjectsAtResourcePath URL, objectMapping:mapping, delegate:self
  end

  def self.manager
    @manager ||= RKObjectManager.managerWithBaseURLString "http://search.twitter.com/search.json?q=.%20For%20example:%20http://search.twitter.com/search.json?q=%40twitterapi"
  end

  def self.objectLoader(objectLoader, didLoadObjects:objects)
    objects.first.max_id_str
  end

  def self.objectLoader(objectLoader, didFailWithError:error)
    puts error
  end

  def self.mapping
    @mapping ||= begin
      mapping = RKObjectMapping.mappingForClass(Photo)
      mapping.mapKeyPath "max_id_str", toAttribute:"max_id_str"
      mapping
    end
  end
end

Photo.load