boxes_layout.rb

class BoxesLayout < MK::Layout

  view :one

  def layout
    add OneViewController.new.view, :one
  end

  def one_style
    background_color "#ff0000".uicolor
    frame [[0, 200], ['50%', 100]]
  end
end

boxes_view_controller.rb

class BoxesViewController < UIViewController
  def loadView
    @layout = BoxesLayout.new
    self.view = @layout.view
  end
end

gistfile1.txt

  Simulate ./build/iPhoneSimulator-8.1-Development/dundler.app
(lldb) command source -s 0 '/var/folders/s1/gvjk3pbd7nq9s2npxh0mv47h0000gn/T/_simgdbcmds_ios'
Executing commands in '/private/var/folders/s1/gvjk3pbd7nq9s2npxh0mv47h0000gn/T/_simgdbcmds_ios'.
(lldb) process attach -p 40814
Process 40814 stopped
Executable module set to "/usr/lib/dyld".
Architecture set to: x86_64-apple-ios.
(lldb) command script import /Library/RubyMotion/lldb/lldb.py
(lldb) breakpoint set --name rb_exc_raise
Breakpoint 1: no locations (pending).
WARNING:  Unable to resolve breakpoint to any actual locations.
(lldb) breakpoint set --name malloc_error_break
Breakpoint 2: no locations (pending).
WARNING:  Unable to resolve breakpoint to any actual locations.
(lldb) continue
Process 40814 resuming
(lldb) 1 location added to breakpoint 1
(lldb) 1 location added to breakpoint 2
Process 40814 stopped
* thread #1: tid = 0x232d93, 0x00000001006d65d1 libobjc.A.dylib`lookUpImpOrForward + 79, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x41e589485590)
    frame #0: 0x00000001006d65d1 libobjc.A.dylib`lookUpImpOrForward + 79
libobjc.A.dylib`lookUpImpOrForward + 79:
-> 0x1006d65d1:  cmpl   $0x0, (%rax)
   0x1006d65d4:  js     0x1006d669e               ; lookUpImpOrForward + 284
   0x1006d65da:  movl   $0x2d, %edi
   0x1006d65df:  callq  0x1006e410e               ; symbol stub for: pthread_getspecific
(lldb)

one_layout.rb

class OneLayout < MK::Layout

  view :button_in_one

  def layout
    @button_in_one = add UIButton, :button_in_one
  end

  def button_in_one_style
    background_color "#0000ff".uicolor
    frame [[0, 0], ['50%', 50]]
    title 'PUSH ONE'
  end
end

one_view_controller.rb

class OneViewController < UIViewController
  def loadView
    @layout = OneLayout.new
    self.view = @layout.view

    @button_in_one = @layout.button_in_one
  end

  def viewDidLoad
    @button_in_one.on(:touch) do
      puts 'THIS CRASHES'
    end

  end
end