Re: Recovering a list of selectors to which an object can respond
Re: Recovering a list of selectors to which an object can respond
- Subject: Re: Recovering a list of selectors to which an object can respond
- From: "Gustavo Vera" <email@hidden>
- Date: Tue, 18 Sep 2007 15:17:25 -0300
I wanna define a place where the developers could implement (following
certain rules and name conventions) functionality to perform data migration
between different database schemes. Those functions should be sequentially
executed by the app during first execution, when previous versions of the
data were detected. When a developer generates changes in the data schema,
he should implement also the corresponding migration functionality just for
that change. The app will execute just the set of needed migration
functions for the data previously generated by older app versions.
9/18/07, David Duncan <email@hidden> wrote:
>
> On Sep 18, 2007, at 10:57 AM, Gustavo Vera wrote:
>
> > I can't find a way to recover a list of selectors to which an
> > object can
> > respond, or a list of subclasses for a specified class. Either I'm
> > searching
> > at the wrong places, or the introspection feature in cocoa is very
> > poor...
> > Someone knows if Is there a way to achieve these goals?
>
> What problem are you trying to solve?
>
> Generally questions like this tend to create a really long thread
> that ends up with someone pointing out that you do the equivalent
> thing in a completely different way that no one mentioned because it
> didn't answer the original question :).
> --
> David Duncan
> Apple DTS Quartz and Printing
> email@hidden
>
>
>
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