Offline chat storage design
Chat in a secondhand marketplace app has to work for reading and writing on the subway. Design the local database schema and the sync flow so that messages sent offline reach the server later and order, duplicates, and read state stay straight.
iOS system designShort answerBasics
Design a simple notes app. Walk me through the architecture, how you store the data, and …
#offline-first #sync #swiftdata
iOS system designShort answerBasics
How is an "offline-first" app architecture different from the usual "network first, fall …
#offline-first #outbox #sync
iOS system designShort answerAdvanced
In an iOS chat app where the network drops often, messages the user sends must not be los…
#chat #outbox #idempotency
PersistenceShort answerExpert
You want to add iCloud sync across devices to a SwiftData/Core Data app that has been loc…
#sync #swiftdata