Path: utzoo!utgpu!watserv1!watmath!att!rutgers!usc!ucselx!petunia!news
From: mdeale@vega.acs.calpoly.edu (Myron Deale)
Newsgroups: comp.sys.next
Subject: Question about Objective-C's @selector
Message-ID: <26a20030.3d07@petunia.CalPoly.EDU>
Date: 16 Jul 90 17:58:08 GMT
Reply-To: mdeale@vega.acs.calpoly.edu (Myron Deale)
Distribution: na
Organization: ACS, Cal Poly, San Luis
Lines: 22




I have something like

[listObject makeObjectsPerform:(SEL)aSelector with:anObject];

but can "aSelector" only be a constant?

I have a radio button matrix that inputs a choice between a number of
different methods. I would like to set some kind of pointer (ala C's
pointer to function), based upon the radio button input, though
aSelector would have to be a variable rather than a constant literal.

   The alternative to a pointer is using a bunch of if-then-else's
each with a listObject call. Pretty ugly, but effective. Setting a
flag in the target object and branching inside the called method is
bad software engineering.


-Myron
// mdeale@cosmos.acs.calpoly.edu