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Re: Warnings that won't go away
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Re: Warnings that won't go away


  • Subject: Re: Warnings that won't go away
  • From: Dan Messing <email@hidden>
  • Date: Wed, 30 Nov 2005 11:23:33 -0600

@class is useful if you just want a header file to know that the class exists, for example if it is being used as a parameter or return value for a function, or if you want to declare an instance variable of that type.

#import needs to be used if you're instantiating objects of the class, using methods from the class, or in the header file if you're inheriting from the class.

Personally, I wouldn't recommend adding any more #imports you actually have to to the header file I think that will just add more confusion to the problem that you started with, even if it does get rid of some warnings.

Dan Messing
Stunt Software
http://www.stuntsoftware.com/


On Nov 30, 2005, at 7:08 AM, email@hidden wrote:

Thanks,

The problem was that I was not including the header file (Playlist.h).
Which leads to my next newbie question. What's the difference between
the @class directive and the #import directive...when should I use one
and not the other? I was using @class, and getting warnings. Do I need
to use #import when I am calling specific methods of my class, and use
@class when I want to instantiate a member variable of a particular
class?

Thanks again,

Tom

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