IOS14 tracking permission for apps compiled with IOS 13

Question

In IOS14 in order to use Advertising Identifier you need to request for permission but what's the behaviour for apps already available on AppStore (Compiled with IOS13 SDK)?

I have updated a device to IOS14 Beta 4 and downloaded app from AppStore. Once I open the app it's not automatically asking for any tracking permission and Advertising Identifier is 00000-0000-0000.

Does this mean I must submit an app update compiled with IOS14 SDK and request for tracking permission otherwise Advertising Identifier won't be available?

Answer 1

Yes, you need to submit a new app version. It will not automatically ask for tracking permission because it should be instantiated via developer. Therefore, you need to use AppTrackingTransparency framework and ask for a user permission:

if #available(iOS 14, *) {
   ATTrackingManager.requestTrackingAuthorization { _ in
   }
} else {
   // Fallback on earlier versions
}