Undefined symbols for architecture x86_64 error on xcode

Question

I have a simple project, on my basic ViewController.m i'm trying to move to another UIViewController by doing:

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
...
}

- (void)addAlarmBrick {
NewAlarmViewController *navc = [[NewAlarmViewController alloc] init];
[self presentViewController:navc animated:YES completion:nil];
}

I have the NewAlarmViewController on my project with the .m file listed in the target membership.

This is the full error message:

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

what am i doing wrong over here?

EDIT:

Adding the settings for both files:

.m file:

.h file:

enter image description here

Itzik984 · Accepted Answer · 2015-03-21 14:46:17Z

1

Well, It turns out the error was not adding the following to the relevant file:

@implementation NewAlarmViewController


@end

I don't know why the @implementation must be added, but it must be.

answered Mar 21, 2015 at 14:46

Itzik984

17k29 gold badges74 silver badges110 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Roger Perez Over a year ago

Can you provide the complete code and file name that pertain to the error? I am having the same issue after coping and pasting from one project to another.

Vamshi Krishna · Accepted Answer · 2015-03-21 13:36:19Z

0

Go to All settings, select your project and check for Architecture and compiler for c/c++/obj c under build options as shown in the screenshot.

answered Mar 21, 2015 at 13:36

Vamshi Krishna

9899 silver badges19 bronze badges

1 Comment

Itzik984 Over a year ago

Thanks for the answer, but i think the problem is else where. im currently running on the simulator and compiling for all architectures

Duncan C · Accepted Answer · 2015-03-21 13:57:55Z

0

It sounds like you might have a library included in your project that is only compiled for ARM, and doesn't provide object code to run on the simulator. Did you include any third party libraries in your project? (Or is NewAlarmViewController from a third party library?)

answered Mar 21, 2015 at 13:57

Duncan C

132k22 gold badges185 silver badges295 bronze badges

1 Comment

Itzik984 Over a year ago

Hi Duncan, NewAlarmViewController is just an empty .h .m files i added (another uiviewcontroller), not from a third party lib. i'll add a screenshot of the settings of the .h file and the .m one to see if it can be helpful

bhr · Accepted Answer · 2015-03-21 14:22:55Z

0

Maybe Xcode messed sth up. Did you already try removing NewAlarmViewController from the project and readding it again? -> Select .h and .m file, press delete, remove reference, and then drag them again into your project.

Also clean the build folder (cmd + alt + shift + k) and rebuild your project.

answered Mar 21, 2015 at 14:22

bhr

2,3471 gold badge24 silver badges32 bronze badges

Collectives™ on Stack Overflow

Undefined symbols for architecture x86_64 error on xcode

4 Answers 4

1 Comment

1 Comment

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related