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From: wiml@milton.u.washington.edu (William Lewis)
Newsgroups: comp.sys.next
Subject: Re: Question about Objective-C's @selector
Message-ID: <5144@milton.u.washington.edu>
Date: 16 Jul 90 23:02:30 GMT
References: <26a20030.3d07@petunia.CalPoly.EDU>
Distribution: na
Organization: University of Washington, Seattle
Lines: 27

In article <26a20030.3d07@petunia.CalPoly.EDU> mdeale@vega.acs.calpoly.edu (Myron Deale) writes:
>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.

  What's wrong with doing something along the lines of

static SEL selectors[] = { @selector("foo:"), @selector("bar:"), 
                             @selector("doom:") };

...

[listObject makeObjectsPerform:selectors[[sender selectedTag]] with:anObject];
...

   

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