UIViewController calling each other's delegate

Question

I have two UIViewController, each has it\'s delegate and is calling one or the other. One class is called TopicViewController and the other is MentionViewController, the cod

Answer 1

It is really strange. The MentionViewController needs the header file of DetailViewController, and the DetailViewController needs MentionViewController's header file. It is a cycle. Maybe you need to create a empty header file, and put all protocol inside it. For example,

MyProtocol.h

@class DetailViewController;
@class MentionViewController;

@protocol DetailViewControllerDelegate

- (void) viewController:(DetailViewController*)viewCon withText:(NSString *) text;

@end

@protocol MentionViewControllerDelegate

- (void) viewController:(MentionViewController*)viewCon withUsername:(NSString *) text;

@end

And add #import MyProtocol.h inside DetailViewController.h and MentionViewController.h.

Answer 2

I think your intuition is correct.

You should be able to solve this problem by declaring the 2 protocols in a header file of their own, then import this file from your .m files. This will break the cycle.

Answer 3

You need to use forward declaration for the protocols and only import the headers in the implementation file.