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I am learning objective c by myself. The book i am reading is Programming in objective c by Steven G Kochan. I am stucked in chapter chapter 8. there is one excercise question i dont understand which i need to understand. I want someone help me with that question explain me how that method works. the question is
"Define a new class called GraphicObject, and make it a subclass of NSObject. Define instance variables in your new class as ...