Couldn't find it in the documentation here so it might help some people.
Seems you need to add the OneSignal 'Notification Service Extension' to your project.
Follow the instructions on https://documentation.onesignal.com/docs/ios-sdk-setup (Part 1 only).
Couldn't find it in the documentation here so it might help some people. Seems you need to add the OneSignal 'Notification Service Extension' to your project. Follow the instructions on
https://documentation.onesignal.com/docs/ios-sdk-setup
(Part 1 only).