iOS 14.4 Validated with Xcode Version 12.3 (12C33)
| OS | isAdvertisingTrackingEnabled | trackingAuthorizationStatus | uuidString |
|---|---|---|---|
| iOS13 | true | - | I was able to get |
| iOS13 | false | - | 00000000-0000-0000-0000-000000000000 |
| iOS14.4 | true | notDetermined | I was able to get |
| iOS14.4 | false | denied | 00000000-0000-0000-0000-000000000000 |
| iOS14.4 | true | authorized | I was able to get |
| iOS14.4 | true | denied | 00000000-0000-0000-0000-000000000000 |
--When isAdvertisingTrackingEnabled = false No alert is displayed even on iOS14 or later and it is treated as denied --requestTrackingAuthorization completion is called even if no alert is displayed --If you forcibly turn off the power without selecting an option in the alert, it will be treated as denied. --I wasn't sure about restricted, but is it okay to treat it the same as denied? --It seems that the value of isAdvertisingTrackingEnabled can be taken properly even on iOS14. --For now, it seems that you can get IDFA if you do not issue an alert ... ――I can't be relieved because the movement tends to change in a short period of time ...
--I checked it on iOS 14.2 and iOS 14.4, but it behaved the same (2021/01/07)