title: Objective-C - define an enum than can be dot called like ENUMTYPE.ENUMVAL
body: <p>I've read many things about enum types in objective-c, and I see there is many ways to define them. But I don't see the right way (if there is one) to define an enum that can be called with CARS.ROLLSROYCE and that cannot be used only with ROLLSROYCE in the code.</p>
  
  <p>So I can define ROLLSROYCE in the CARS enum and also in the BEAUTIFULCARS enum.</p>
  
  <p>Do you know the way to define such an enum ?</p>