You want to add iCloud sync across devices to a SwiftData/Core Data app that has been local only. What do you have to change in the schema and the design before you turn on NSPersistentCloudKitContainer (or SwiftData's cloudKitDatabase)?
CloudKit mirroring allows no unique constraints, no required relationships, and no non-optional attributes without a default, so every attribute has to be optional or defaulted and relationships have to be optional with an inverse.
iOS system designShort answerBasics
Design a simple notes app. Walk me through the architecture, how you store the data, and…
#cloudkit #swiftdata #sync #conflict
PersistenceShort answerExpert
You need to sync a notes app's local database with the server. Downloading everything…
#sync #conflict
PersistenceShort answerAdvanced
Chat in a secondhand marketplace app has to work for reading and writing on the subway…
#swiftdata #sync
iOS system designMultiple choiceAdvanced
In an offline-first to-do app, two devices edit the same item while offline and then…
#sync #conflict