duplicate symbols for architecture armv7

Question

Getting following error when try to use Layar SDK in my existing app. How can I solve this?

Ld /Users/pnawale/Library/Developer/Xcode/DerivedData/hub-afxxzaq         


        

Answer 1

I just fixed this error. I had CocoaPods installing a few frameworks (AWS, SDWebImage, AFNetworking. I manually dragged in 2 frameworks, Facebook and ImageIO. Most of my "duplicate symbol" errors were caught on Facebook classes. I deleted the framework and added it to the Podfile. Must have been an error or duplication in the libraries required by Facebook.

Answer 2

Generally, this kind of error occurs due to duplicate classes and xibs in your project folder. For example, in my project I had some class files duplicated(.h/.m files). You can see these duplicate classes under target->Build phases->compile sources.

Just look and remove extra classes. Problem will be solved.

Answer 3

I also had duplicate symbols. I just renamed the procedure (app -> app1, app2) and the associated fields app.XXX -> app1.XXX . and it worked !

See : (in a .m file)

AppDelegate* app1;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        app1 = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    }
    return self;
}

(...)

- (int) getLimit
{
    if (app1.product2buyed)
        return MAXID;
    else if (app1.product1buyed)
        return 70;
    else
        return 10;

Answer 4

I have faced this problem once before. The reason is that I copied some methods and variables declared in the implementation body from one class to another. So rename these methods and moved these variable to the interface declaration area => solved.

Answer 5

I had duplicate files in my Xcode. Physically there were one m-file and one h-file. But in project it were doubled causing duplicates in compile sources. After deleting duplicate m and h file problem was solved.

Answer 6

This can happen if you accidentally #import a .m file instead of the .h!