Re: What is the equivalent of a C++ pure-virtual function in Objective-C?

[Michael A. Crawford]

I submitted this question only after trying to find the answer in a couple newer Cocoa programming texts that I own. Then, I went and dug up a older text from 2002: Cocoa Programming from Anguish, Buck, and Yacktman. I found something called a Protocol. From what I've read so far this is what I need. I jumped the gun on posting the question here before exhausting my local resources. Sorry for that. Still, anyone wants to give me some guidance on protocols and how they should be employed, I'm all ears (eyes).

-Michael
----------------------
The difference between genius and stupidity...
...is that genius has its limits."

-- Albert Einstein



On Jan 11, 2009, at 6:20 PM, Michael A. Crawford wrote:

I want to force derived classes to implement a given interface without provided a default implementation. Does the concept exist in Objective-C (I'm almost sure it does)? If so, what does the syntax look like?

-Michael
----------------------
The united stand.  The divided get played.

-- Bernie MAC




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