Owner Superman

iOS App Architecture (dummy)

The iOS app is built in Swift with SwiftUI on the surface and a plain old model layer underneath.

Layers

  • View — SwiftUI. Stateless where possible.
  • ViewModel — ObservableObject. Owns state, formats data for the view.
  • Repository — async functions returning domain models. No UI concerns.
  • Network / Storage — the lowest layer, talks to the API and local cache.

We use a single NavigationStack per tab, driven by a typed enum of destinations. Deep links resolve to the same enum so the navigator code stays honest.

Testing

  • ViewModels are tested with plain unit tests — no UI runtime.
  • Repositories are tested against an in-memory fake network.
  • Snapshot tests cover visual regressions on the most-used screens.

Keep business logic out of views. A view should be a function of state; anything harder than that belongs one layer down.