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When I was first learning Cocoa, some very smart people told me that Objective-C is C with objects. I hear that now and it sounds like describing the desert as “a place with a lot of sand.” It’s technically a true statement, but it doesn’t really tell you much about the language.
Writing a Cocoa app is nothing like writing software with standard C libraries. The C foundation is just a vehicle, not the basis for how you design your application. In my experience, there are three standout features of Objective-C: