Push NotificationsをCloudKitで使ってみる(CoreData 手習い#9) https://s-cape.dev/push-notifications%e3%82%92cloudkit%e3%81%a7%e4%bd%bf%e3%81%a3%e3%81%a6%e3%81%bf%e3%82%8bcoredata-%e6%89%8b%e7%bf%92%e3%81%849/