react.rb

class MainScreen
  stylesheet MainControllerStylesheet
  
  def on_load
    set_state({ first_name: "Jamon", last_name: "Holmgren" })
    attach_events
  end
  
  def attach_events
    find(:button).on(:tap) { set_state({ first_name: "Todd", last_name: "Werth" }) }
  end
end

class MainControllerStylesheet < ApplicationStylesheet
  def setup
    # Add stylesheet specific setup stuff here.
    # Add application specific setup stuff in application_stylesheet.rb
  end

  def layout
    find_or_append(UILabel, :first_name_label)
    find_or_append(UILabel, :first_name).data(state[:first_name])

    find_or_append(UILabel, :last_name_label)
    find_or_append(UILabel, :last_name).data(state[:first_name])
  end

  # ... styles here
end