duplicate symbols for architecture i386 clang

objective-c ios5 admob

Another reason this error often happens is accidentally importing the .m file instead of the .h.

objective-c ios5 admob

Steps:

Check Build phases in Target settings.
Check if any file exists twice or once.
If file exist twice delete one. If not delete file in the bottomwhich is the latest one.
Build again.

objective-c ios5 admob

Just to add to the possible solutions.

In my case I had accidentally declared and initialized a variable in a header file.

For example this is wrong:

MyFile.h

#import <Foundation/Foundation.h>NSInteger const ABCMyConstant = 6;

It should be:

MyFile.h

#import <Foundation/Foundation.h>NSInteger const ABCMyConstant;

MyFile.m

#import "MyFile.h"NSInteger const ABCMyConstant = 6;

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