IDFA iOS14 returns denied without displaying auth popup

Question

I am doing a research on getting the IDFA on iOS 14. I am using iPhone 8 Plus.

I have added

<key>NSUserTrackingUsageDescription</key> <string>App would like to access IDFA for tracking purpose</string> 

in the .plist file.

Then added

let type = ATTrackingManager.trackingAuthorizationStatus; 

which returns .denied, having

func requestPermission() {         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")             }         }     } 

But I'm getting .denied without any popup.

Do you know what is happening?

Answer 1

There's an option "Allow Apps to Request to Track" in system's Settings app, and if it's off, requestTrackingAuthorization will return .denied immediately.