call resignFirstResponder for nil

gistfile1.rb

class NilClass
    def method_missing(method, *args, &block)
        if method.to_s == "resignFirstResponder"
            return nil
        else
            super
        end
    end
end

# send resignFirstResponder with nil check to all UIView
views.each do |view|
    view.resignFirstResponder
end

nil.becomeFirstResponder # NoMethodException as ever