From a simple concept perspective, I need my app to know when a user adds a new photo to the photo library when my app is in the background or not running. If a new photo is taken app needs to take action to see if the app has a face in it using PhotoKit and facial recognition. If the app finds the photo does have a face then notify the user. Couple of notes. The notifications will come periodically as not to overload the user with notifications.
looks like I need to use PHPhotoLibrary ChangeObserver and need to understand if the app will be notified when it is in the background.
