swift-architecture

For a complex SwiftUI feature, patterns like TCA or MVI offer high testability and clear state management. The best architecture choice depends on evaluating feature complexity, scalability requirements, and your team's familiarity with pattern-specific paradigms.

Migrating UIKit app architecture requires a strategy that maintains code integrity and scalability. You can transition to patterns like MVVM or VIPER by following structured migration guidance to incrementally refactor components without breaking existing functionality.

Choosing between MVVM and TCA involves comparing pattern complexity and testability. MVVM offers simplicity and works well with SwiftUI's `@Observable`, while TCA provides strict state management and composability for highly complex app features.

The MV pattern with `@Observable` works for Apple platform apps, but its suitability for large apps depends on feature complexity. For highly complex features, evaluating more structured patterns like Clean Architecture or VIPER is recommended to ensure scalability.

You should use the Coordinator pattern in a SwiftUI app when you need to manage complex navigation flows. It helps separate navigation logic from view presentation, improving code maintainability and testability for apps with deep routing hierarchies.