Access Swift Class in Objective C Header

Question

I have been mixing Swift and Objective C just fine but I'm having issues gaining access to a Swift class from the HEADER file of Objective C. I can do so successfully in the .m file.

Within the .h file I import the Xcode generated file that has the format "Appname-Swift.h". However, in doing so I get the message that the file is not found. I can do this same import in my .m file with no issue. However, I need it in the .h file as I reference a Swift class that I need access to with public API.

How can I make use of the Swift class from the .h portion of Objective C?

Example:

#import <UIKit/UIKit.h>
#import "MyApp-Swift.h"

@interface SelectedContactsVC : UIViewController

@property (nonatomic,strong) MapVC *mapVC;

@end

MapVC above is a Swift class.

OOPer · Accepted Answer · 2016-07-10 20:13:46Z

18

Move #import "MyApp-Swift.h" to .m file.

And make your .h file as:

#import <UIKit/UIKit.h>
@class MapVC;

@interface SelectedContactsVC : UIViewController

@property (nonatomic,strong) MapVC *mapVC;

@end

Swift cannot generate "MyApp-Swift.h", if it's imported from Objective-C header, sort of mutual dependency thing maybe.

answered Jul 10, 2016 at 20:13

OOPer

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3 Comments

C6Silver Over a year ago

Thank you, this worked! Is adding the "@class" this way sort of like a forward declaration?

OOPer Over a year ago

Yes, it teaches the compiler that the symbol is actually a class, but gives no other info. In most cases it's useful enough to avoid mutual dependency.

CalZone Over a year ago

Awesome! exactly what I was looking for too. Thanks!

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