Using NS_STRING_ENUM can be verbose when used in objective c. Below is an example of how macros can be used to shorten it. These macros can be used and reused by cleverly defining and underlining macros.

simplified_NS_STRING_ENUM.h

//global macro helpers
#define DH_Str(I) #I
#define __DH_STRING_ENUM(PREFIX, SUFFIX, PREFIX2, SUFFIX2) \
    static PREFIX PREFIX##_##SUFFIX = @DH_Str(PREFIX2##SUFFIX2);
#define _DH_STRING_ENUM2(PREFIX, SUFFIX, VAL) \
    static PREFIX PREFIX##_##SUFFIX = VAL;
#define _DH_STRING_ENUM(T,I) \
    __DH_STRING_ENUM(T, I, T, I)
//------ file dependent
// the enum type shall be DHBlahKey
typedef NSString * DHBlahKey NS_STRING_ENUM;
#define DH_STRING_ENUM(I) \
    _DH_STRING_ENUM(DHBlahKey, I)
#define DH_STRING_ENUM2(I,J) \
    _DH_STRING_ENUM2(DHBlahKey, I, J)

// make swift objc enums
DH_STRING_ENUM(pop)
DH_STRING_ENUM2(crackel, @"To Snap")

// undef so same macro can be reused
#undef DH_STRING_ENUM
#undef DH_STRING_ENUM2

///<<<-----new type
// the enum type shall be DHWowKey.  Noticed how I only needed to modify these 3 lines
typedef NSString * DHWowKey NS_STRING_ENUM;
#define DH_STRING_ENUM(I) \
    _DH_STRING_ENUM(DHWowKey, I)
#define DH_STRING_ENUM2(I,J) \
    _DH_STRING_ENUM2(DHWowKey, I, J)

// make swift objc enums
DH_STRING_ENUM(pop)
DH_STRING_ENUM2(crackel, @"To Snap")

// undef so same macro can be reused
#undef DH_STRING_ENUM
#undef DH_STRING_ENUM2

/*
 //Obj-c Usage
 NSLog(@"%@", DHBlahKey_pop); // "DHBlahKeypop"
 NSLog(@"%@", DHBlahKey_crackel); // "To Snap"
 NSLog(@"%@", DHWowKey_pop); // "DHWowKeypop"
 NSLog(@"%@", DHWowKey_crackel); // "To Snap"
 
 // Swift usage
 print(DHBlahKey._pop.rawValue); // "DHBlahKeypop"
 print(DHBlahKey._crackel.rawValue); // "To Snap"
 print(DHWowKey._pop.rawValue); // "DHWowKeypop"
 print(DHWowKey._crackel.rawValue); // "To Snap"
 */