How do I add IDFA to my mobile Data Layer?

[#1]

Question

How do I add IDFA to my mobile Data Layer?

Answer

The following is example code for adding an app's IDFA string to the Data Layer.

Learn more about ASIdentifierManager.

// Objective-C
// 1. Place into a helper class that calls Tealium

// 2. Add import statement at the top of the class with other imports - DON'T FORGET to
//     add the AdSupport.framework in your project's target build.
@import AdSupport;

// 3. Add this class function
+ (NSString*) identifierForAdvertising {
    if([[ASIdentifierManager sharedManager] isAdvertisingTrackingEnabled]){
        NSUUID *idfa = [[ASIdentifierManager sharedManager] advertisingIdentifier];
        return [idfa UUIDString];
    }
    return nil;
}

// 4. Example Tealium initialization & adding the IDFA as a persistent data point.
+ (void) startTealium {
    TEALConfiguration *config = [TEALConfiguration configurationWithAccount:@"(account)" profile:@"(profile)" environment:@"(environment)"];
    Tealium *tealium = [Tealium newInstanceForKey:@"(uniqueId)" configuration:config];

    // Alternatively just add the following 2 lines to wherever a Tealium instance is
    // already initialized.
    NSString *idfa = [self identifierForAdvertising];
    [tealium addPersistentDataSources:@{@"idfa":idfa}];
}