The GameKit native extension and demo Defold project I’ve been working on is now released:
It is still a work in progress but the following integrated GameKit features are functional:
Players, Leaderboards, Achievements, View Controllers and Errors.
I’ll be adding Real-Time Matches next.
Possible GameKit features to be integrated: Challenges, Player Invitations, Notifications, Entitlements, Turn-based Games and Save Game Data.
I don’t own an iOS 13 device, so I haven’t been able to test what happens to playerID in iOS 13.
If you find any bugs or have any questions please post them here.