Objective-C supports inheritance (but not multiple inheritance) like any good object oriented language. However, like many newer OOP languages, such as C# and Ruby, Objective-C 2.0 also supports extension methods, which in Objective-C parlance are called Categories. If you are at all familiar with C# (3.0 and on) you might have created extension methods, extending... Yearning to get the rest of "Objective-C Categories?" Click the link!
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