Reference to 'X' is ambiguous

Question

After several changes to my project I suddenly get this build error:

Reference to \'kCGImageAlphaPremultipliedLast\' is ambiguous

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Answer 1

use

#import "anyviewcontroller.h"

instead of any module

@import anymodule;

I am using LGSideMenuController, when i integrate it first time, it is working well, but i don't know why i got this error after some time.

so i replaced module @import LGSideMenuController; into header file Like this #import "UIViewController+LGSideMenuController.h"

and error goes away.