Re: forward class warning
Re: forward class warning
- Subject: Re: forward class warning
- From: "john chen" <email@hidden>
- Date: Thu, 15 Nov 2007 22:31:15 -0600
Nick is right, added #import "PreferenceController.h" at the class that
uses PreferenceController should work.
John
On 11/15/07, Nick Zitzmann <email@hidden> wrote:
>
>
> On Nov 14, 2007, at 10:56 PM, email@hidden wrote:
>
> > In Leopard I opened a project I created in Tiger. It now gets 3
> > warnings, just like the following:
> >
> > warning: PreferenceController is a forward class and corresponding
> > @interface may not exist.
> >
> > PreferenceController is a NSWindowController subclass. I can't find
> > anything about "forward class" when searching Apple's Developer
> > Connection web site (not surprising). Can anyone explain to me what
> > this warning means?
>
>
> It means you declared an @class somewhere but did not include a more
> concrete definition anywhere. In Xcode 2.x and earlier, GCC didn't
> really care if you did that, but starting in Leopard, it does. You
> probably just need to add a #import on the proper file at the top of
> the implementation.
>
> Nick Zitzmann
> <http://www.chronosnet.com/>
>
>
>
>
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