Question

I am trying to do mapping with Restkit and created 2 classes as below. I got the following errors:

• Unknown type name “Card” in Campaign.h
• Unknown type name “Campaign” in Card.h
• Property with ‘retain (or strong)’ attribute must be of object type
• … more but similar errors

My question is there a way to achieve below class declaration by re-using class.

Campaign.h

#import "Card.h"

@interface Campaign : NSObject

@property (nonatomic, strong) NSNumber* campaignId;
@property (nonatomic, strong) NSString* title;
@property (nonatomic, strong) Card* card;

@end

Card.h

#import "Campaign.h"

@interface Card : NSObject

@property (nonatomic, strong) NSNumber* cardId;
@property (nonatomic, strong) NSString* name;
@property (nonatomic, strong) Campaign* campaign;

@end

Answer 1

Just in case someone need it in future. Here my solution:

Campaign.h

@class Card;

@interface Campaign : NSManagedObject

@property (nonatomic, strong) NSNumber* campaignId;
@property (nonatomic, strong) NSString* title;
@property (nonatomic, strong) Card* card;

@end

Campaign.m

#import "Card.h"

@implementation Campaign

...

@end

Card.h

@class Campaign;

@interface Card : NSManagedObject

@property (nonatomic, strong) NSNumber* cardId;
@property (nonatomic, strong) NSString* name;
@property (nonatomic, strong) Campaign* campaign;

@end

Card.m

#import "Campaign.h"

@implementation Card

...

@end