ios - Duplicate symbols (project using library using same library as project) -

a static library. b static library uses a library. c application uses both a , b libraries.

problem duplicate symbols in c obvious.

what proper (official) solution avoid problem. want use a in b. a, b, c mine projects in 1 xcode workspace.

problem occurs imports ie

#import "a.h" #import "b.h" #import "c.h"

in interfaces of each other.. better way avoid scenario not import .h file in interface class instead can do

@class a; @class b; @class c;

in interface, , import respective .h class in .m file.

so should this

in a.h class

@class b; @class c;  @interface : nsobject  @end

in a.m class

#import "b.h" #import "c.h" @implementation  @end

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