Conditional Compiling based on Frameworks

It's impossible to answer this question without more details.

 

If you Get Info a target or project, you can define a preprocessor macro under the Build tab. Then you can check for that in the code. So say you define MY_FEATURE, then in code you can use

Code:

#ifdef MY_FEATURE
- (void)myMethod;
#endif

Or you can define it elsewhere, such as a .pch or .h file:

 

Cocoa.framework is just a convenience framework, you don't need to use it. You can link to AppKit, Foundation, and CoreData directly, turning them on and off for any given target.

Why not just put your CoreData methods in a separate file as a category on your class. Then you can disable compiling that file altogether for the target that doesn't use CoreData. No need to mess with macros.