UIBarButtonItem with custom view using SimpleView crash

[jjuliano]

I add a UIButton to a UIBarButtonItem, the using the SimpleView button builder and the UI::UIButtonBuilder.new.build(..) crashed.

1. This crashed
   @nav_add_button = UI::Layouts.setup(view) do
   button buttonType: UIButtonTypeCustom, width: 32, height: 32 do
   @view.setBackgroundImage(UIImage.imageNamed("normal.png"), forState:UIControlStateNormal)
   @view.setBackgroundImage(UIImage.imageNamed("clicked.png"), forState:UIControlStateHighlighted)
   @view.addTarget(self, action:'performAdd', forControlEvents:UIControlEventTouchUpInside)
   end
   end

   self.navigationItem.rightBarButtonItem = UIBarButtonItem.alloc.initWithCustomView(@nav_add_button)

2. Crashed
   @nav_add_button = UI::UIButtonBuilder.new.build(UIButton, buttonType: UIButtonTypeCustom)
   @nav_add_button.setBackgroundImage(UIImage.imageNamed("normal.png"), forState:UIControlStateNormal)
   @nav_add_button.setBackgroundImage(UIImage.imageNamed("clicked.png"), forState:UIControlStateHighlighted)
   @nav_add_button.frame = [[0,0], [32, 32]]
   @nav_add_button.addTarget(self, action:'performAdd', forControlEvents:UIControlEventTouchUpInside)

   self.navigationItem.rightBarButtonItem = UIBarButtonItem.alloc.initWithCustomView(@nav_add_button)

3. This works as expected

   @nav_add_button = UIButton.buttonWithType(UIButtonTypeCustom)
   @nav_add_button.setBackgroundImage(UIImage.imageNamed("normal.png"), forState:UIControlStateNormal)
   @nav_add_button.setBackgroundImage(UIImage.imageNamed("clicked.png"), forState:UIControlStateHighlighted)
   @nav_add_button.frame = [[0,0], [32, 32]]
   @nav_add_button.addTarget(self, action:'performAdd', forControlEvents:UIControlEventTouchUpInside)

   self.navigationItem.rightBarButtonItem = UIBarButtonItem.alloc.initWithCustomView(@nav_add_button)