ios - No visible @interface for ____ declares the selector -

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i have set method in separate class (called externalclass) needs take 2 arguments. 

-(void) openimage:(nsdictionary *)payload inapp:(uiapplication *)app;

in appdelegate.m, call method this:

 - (void)application:(uiapplication *)application didreceiveremotenotification:(nsdictionary *)payload fetchcompletionhandler (void (^)(uibackgroundfetchresult))completionhandler     {         [[externalclass sharedinstance] openimage:payload inapp:application];     }

i getting "no visible @interface externalclass declares selector 'openimage:inapp'

any idea why?

i think forgot declare method in header(.h) file.

declare method in externalclass.h file.

-(void) openimage:(nsdictionary *)payload inapp:(uiapplication *)app;

and import externalclass.h , want use method.


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