Q:

iOS: How to get the #define from a Constant.h ObjC in a Swift File? 

When I write this in the constant.h file:
#define WS_PLANNING_INFORMATION "registrations/"

It works when I call it from the Swift file. 
But if I write this in the constant.h file:
#define WS_PLANNING_INFORMATION "registrations/" CRYPTOKEY

It doesn't work.  The swift file doesn't see the WS_PLANNING_INFORMATION anymore. 
Is there an easy way to concatenate two strings in the constant.h file to be well-retrieved by the swift file? 
(The validate answer to this question is very useful and more simple than in that ticket, that doesn't suit me)

A:

Use constants instead of macros. 
in constant.h
extern const char *WS_PLANNING_INFORMATION;

in constant.m
const char *WS_PLANNING_INFORMATION = "registrations/" CRYPTOKEY;

If you mean to use NSString * instead of char *
in constant.h
extern const NSString *WS_PLANNING_INFORMATION;

in constant.m
const NSString *WS_PLANNING_INFORMATION = @"registrations/" CRYPTOKEY;

