What could be the reason for this error during build - 'undefined symbols for architecture i386"

Question

It's the first time I am working with the location services and I am hitting this linker error:

Undefined symbols for architecture i386: "_OBJC_CLASS_$_CLLocationManager"

I had added #import <CoreLocation/CoreLocation.h> and added the following lines in the viewDidLoad

 CLLocationManager *manager = [[CLLocationManager alloc] init];
manager.delegate = self;
[manager startUpdatingLocation];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

if (![CLLocationManager locationServicesEnabled]){
    UIAlertView *servicesDisabledAlert = [[UIAlertView alloc] initWithTitle:@"Location Services Disabled" message:@"You currently have all location services for this device disabled. If you proceed, you will be asked to confirm whether location services should be reenabled." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [servicesDisabledAlert show];
    [servicesDisabledAlert release];
}
[manager release];

enter image description here

You might want to edit the question title to be more descriptive. — Shane Wealti, Aug 08 '11 at 19:50
possible duplicate of [How to resolve Undefined Symbols error?](http://stackoverflow.com/questions/804510/how-to-resolve-undefined-symbols-error) — jscs, Aug 08 '11 at 19:57

score 8 · Accepted Answer · answered Aug 08 '11 at 19:54

8

You need to add CoreLocation framework to your project.

answered Aug 08 '11 at 19:54

Filip Radelic

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score 1 · Answer 2 · answered Aug 08 '11 at 19:55

1

Make sure the Core Location framework is linked to your project before building.

answered Aug 08 '11 at 19:55

Perception

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score 1 · Answer 3 · edited May 23 '17 at 12:21

1

Did you remember to add the framework to your project under the build phases? Here... How to "add existing frameworks" in Xcode 4?

edited May 23 '17 at 12:21

Community

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answered Aug 08 '11 at 19:57

mjisrawi

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What could be the reason for this error during build - 'undefined symbols for architecture i386"

3 Answers3

Linked