receiver type *** for instance message is a forward declaration

Question

In my iOS5 app, I have NSObject States class, and trying to init it:

states = [states init];

here is init

Answer 1

If you are getting this error while trying to use Swift class or method in Objective C: you forgot one of 2 steps Apple defined on this diagram:

Example:

Error shows up in your Test.m file:

Receiver 'MyClass' for class message is a forward declaration

Step 1: check that Test.h has

@class MyClass;

Step 2: find *-Swift.h file name in Build Settings (look for Objective-C Generated Interface Header Name). Name will be something like MyModule-Swift.h

Step 3: check that Test.m imports the above header

#import "MyModule-Swift.h"