Getting warning in iPhone: NSString may not respond to '-JSONValue'

问题

In my iPhone app, I am making an access to the webserver to fetch the data.

Here I am using JSON to retrieve the data from database.

I get a warning that says:

NSString may not respond to '-JSONValue'

How to resolve it?

回答1:

Add this #import "JSON.h" at the top of your .m or .h file.

回答2:

Have you tried to add JSON Library to your project and import it

#import "JSON/JSON.h"

回答3:

You probably just miss the include to your JSON library

来源：https://stackoverflow.com/questions/4669061/getting-warning-in-iphone-nsstring-may-not-respond-to-jsonvalue