On Nov 20, 2009, at 12:22 PM, Jens Alfke wrote:
>
> On Nov 20, 2009, at 12:09 PM, Michael de Haan wrote:
>
>> Does the, in your opinion, "optional" addition pretty much replace
>> categories as a whole, or is there still a role for them?
>
> It replaces informal protocols. There are many other uses for categories, like
>
> * Breaking a class implementation across several source files
> * Declaring private/internal class methods that a few other classes are
> allowed to call
> * Declaring some of a class's methods in other headers (ones that only make
> sense in the context of that other header)
> * Adding methods to a pre-existing framework class
Not to overlook the all-important AppKit and UIKit 'Additions' to their
respective Foundation Frameworks . . .
Cheers,
. . . . . . . . Henry
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