Home/ Questions/Q 3426264
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-18T06:41:39+00:00

My AppDelegate class has quite a few methods. In my attempt to organize these

  • 0

My AppDelegate class has quite a few methods. In my attempt to organize these methods I’m trying to group some of these methods in a category.

So now I have these files:

  • AppDelegate.h
  • AppDelegate.m
  • AppDelegate+GameCenter.h
  • AppDelegate+GameCenter.m

My category is ofcourse defined like this:

@interface AppDelegate (GameCenter)
// methods
@end

When I compile I get this error: ‘Cannot find interface declaration for ‘AppDelegate’.

I think that means I have to import a file somewhere. But what file do I have to import and where? My first thought was to import AppDelegate+GameCenter.h in AppDelegate.m. But that doesn’t work. Any tips? What is the best way to handle this?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Sounds like this error is coming from a missing

    #import "AppDelegate.h"

    in the header of “AppDelegate+GameCenter.h”. Add that, and, of course, stick with

    #import "AppDelegate+GameCenter.h"

    in the header of AppDelegate.m, as you’ve done.

    • 0