Subclass/ Superclass Objective-C

I'm learning Objectiv开发者_Go百科e-C, noob question.

I'm working on a project in Xcode that requires multiple geometric object-types (square, triangle, etc). Each object file is made a subclass of the superclass "GraphicObject," for which there is a file as well obviously.

My question is, when I create a new file to contain main code body, I cannot seem to make the new file recognize the subclasses of GraphicObject unless I do this:

#import "GraphicObject.h"

#import "Rectangle.h"

#import "Triangle.h"

#import "Circle.h"

#import "Square.h"

Is there a way for me to have the file refer to all subclasses of the GraphicObject class without explicitly adding them via the #import function?

Thank you for reading.

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I think you are confusing subclasses and dependencies. Just because Rectangle inherits from GraphicObject, the class that uses just GraphicObject has no idea what Rectangle is. You would need to use all of those #imports.