How to two strings in #define?

Question

I'm using

#define SITO @"http://localhost:3000"
#define MISSING @"http://localhost:3000/photos/large/missing.png"

Is it possible to do this dynamically? I mean

#define SITO @"http://localhost:3000"
#define MISSING @"<<SITO>>/photos/large/missing.png"

Answer 1

Use...

#define MISSING SITO @"/photos/large/missing.png"

Answer 2

You are not allowed you embed one micro within other. But you could nested as suggested by @Simon Lee.

Use the below approach.

#define SITO @"http://localhost:3000"
#define MISSING @"<<%@>>/photos/large/missing.png"

Construct a string as belwo.

NSString* Missing = [NSString stringWithFormat:MISSING,SITO];
NSLog(@"Missing %@", Missing);