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Home/ Questions/Q 9156605
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Editorial Team
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Editorial Team
Asked: June 17, 20262026-06-17T12:48:43+00:00 2026-06-17T12:48:43+00:00

.h @interface AdvancedSearchMainVC : UIViewController .m #import AdvancedSearchMainVC.h @interface AdvancedSearchMainVC () @end @implementation AdvancedSearchMainVC

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.h

@interface AdvancedSearchMainVC : UIViewController

.m

#import "AdvancedSearchMainVC.h"

@interface AdvancedSearchMainVC ()

@end

@implementation AdvancedSearchMainVC

which is the best location to add "#define HIDEBUTTON_TAG 100" and why

what’s the different between macro definition at @interface @ implementation and in .h

thx a lot~~

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  1. Editorial Team
    Editorial Team
    2026-06-17T12:48:44+00:00Added an answer on June 17, 2026 at 12:48 pm

    AFAIK, the only difference is scope. If you define it in the interface, anything that imports the header can also access the value, whereas if you put it in the implementation it can only be accessed by that class’s methods.

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