Does the respondsToSelector method have to exist?

Posted by John Smith on Stack Overflow See other posts from Stack Overflow or by John Smith
Published on 2010-04-18T05:34:17Z Indexed on 2010/04/18 5:43 UTC
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objective-c

|

cocoa

Does a method which I check for with respondsToSelector have to actually exist?

What if I only define it in the interface part and fail to implement it? I'm looking at a poor-man's virtual function in Objective-C.

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