Error "_OBJC_CLASS_$_AppDelegate", referenced from:" and error: linker command failed with exit code 1 (use -v to see invocation)"

Question

I'm pretty new to developing, and i got this error, I'm not shire if i got something missing in my AppDelegate files so I'm gonna show you the files.

the h-file

#import <UIKit/UIKit.h>


@interface AppDelegate: UIResponder <UIApplicationDelegate>


@property (strong, nonatomic)  UIWindow *window;

@end

the m-file

#import "AppDelegate.h"

the thing is that i think i removed something from te m-file but i can't remember what it was

here is the full error message:

Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_AppDelegate", referenced from: objc-class-ref in main.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

@Andy I am getting error. may I know how to could you resolve it? — ThinkAndCode, Oct 01 '21 at 10:26

score 32 · Accepted Answer · answered Sep 18 '14 at 09:22

32

You will need to make sure that your AppDelegate.m is added under Compile Sources in your target settings.

To do this, click on the project (left upper on your Xcode window) -> Click on Build Phases tab -> Compile Sources and then check to see whether AppDelegate.m is actually added to the list. If not, click + button -> Type AppDelegate.m -> Select and then Add it. That should do.

answered Sep 18 '14 at 09:22

GenieWanted

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thanks, but the AppDelegate.m are added to the Compile Sources, but it docent work – Andy Sep 18 '14 at 09:27
1

i forgotten the interface AppDelegate in my m.file. oh i mean the implementation ofc ;) – Andy Sep 18 '14 at 09:42
saved my day.feeling happy – Krutarth Patel Jan 09 '17 at 11:50
1

AppDelegate.m is already in that list but still getting error. This is happening only while archiving. Any alternatives to try? – ThinkAndCode Oct 01 '21 at 10:24
3

This happened to me in 2022 after upgrading to React Native 0.68.2 because AppDelegate.m was removed and AppDelegate.mm was added. I followed your advice and added AppDelegate.mm instead and it solved the problem for me. – Adnan Erkocevic May 21 '22 at 07:14
Its already there , any other solutions for RN 0.62 – Kartiikeya Sep 29 '22 at 13:58

Error "_OBJC_CLASS_$_AppDelegate", referenced from:" and error: linker command failed with exit code 1 (use -v to see invocation)"

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