How to add the AppTrackingTransparency permission to your iOS apps

For those who might be struggling with the same things, I got the AppTrackingTransparency dialog box to appear with the function,

import AppTrackingTransparency
import AdSupport

//NEWLY ADDED PERMISSIONS FOR iOS 14
func requestPermission() {
    if #available(iOS 14, *) {
        ATTrackingManager.requestTrackingAuthorization { status in
            switch status {
            case .authorized:
                // Tracking authorization dialog was shown
                // and we are authorized
                print("Authorized")
                
                // Now that we are authorized we can get the IDFA
                print(ASIdentifierManager.shared().advertisingIdentifier)
            case .denied:
                // Tracking authorization dialog was
                // shown and permission is denied
                print("Denied")
            case .notDetermined:
                // Tracking authorization dialog has not been shown
                print("Not Determined")
            case .restricted:
                print("Restricted")
            @unknown default:
                print("Unknown")
            }
        }
    }
}
//

I then simply called the function requestPermission() on the app’s login page, so users see the permission dialog before signing in. Without calling the function, the dialog box show in this guide, https://developers.google.com/admob/ios/ios14, doesn’t appear for me.

This article has an example github project: https://medium.com/@nish.bhasin/how-to-get-idfa-in-ios14-54f7ea02aa42