root_view.rb

Teacup::Stylesheet.new :root_style do

  style :label,
	  text: "Label",
    backgroundColor: :gray,
    font: :bold.uifont(15),
    textColor: :white,
    shadowColor: :black,
    textAlignment: :right,
    layer: {
      transform: identity,
      shadowRadius: 20,
      shadowOpacity: 0.5,
      masksToBounds: false
    },
    frame: [[100,0], [100,100]],
    constraints: [
      constrain_top(30),
      constrain(:right).equals(:superview, :center_x),
      constrain(:width).equals(:superview, :width).times(1.5)
    ]
end

class RootView < UIView
  include Teacup::Layout
  stylesheet :root_style

  attr_accessor :greeting

  def initialize
    ap "RootView initialize"
  end


  def initWithFrame(frame)
    ap "RootView.initWithFrame called"
    @greeting = "Hello World"
    super.tap do
      self.style(backgroundColor: :white)

      @label_styled = layout(UILabel, :label)


      # Creating a UILabel without a stylesheet reference
      @label = UILabel.new
      @label.style(
          text: @greeting,
          backgroundColor: :blue,
          x: 0.0, y: 0.0,
          width: 100.0, height: 100.0
      )


      @button = UIButton.rounded_rect
      @button.style(title: "Press me",
                    x: 100, y: 200,
                    width: 150, height: 20)
      @button.addTarget(self, action:'button_touched', forControlEvents:UIControlEventTouchUpInside)

      addSubview @label
      addSubview @label_styled
      addSubview @button
    end
  end

  def button_touched
    ap "RootView Button Touched"
  end
end

Example of using Teacup styles and stylesheets inside a UIView

Gems in use for the syntax used here: teacup, sugarcube, sweettea, awesome_print_motion