axiom-swiftui-architecture

To separate logic from SwiftUI views, you extract it into layers like Models, ViewModels, or Services. This refactoring process improves testability by allowing you to unit test logic independently without relying on SwiftUI view rendering.

The best SwiftUI architecture depends on project needs, with options including MVVM, TCA, Apple's native patterns, and the Coordinator pattern. Decision trees help evaluate these choices based on testability and codebase organization requirements for iOS 26+ development.

MVVM and TCA represent distinct architectural approaches for SwiftUI codebases. MVVM uses ViewModels for state management, while TCA offers a composable architecture pattern; choosing between them involves evaluating testability needs and project complexity using decision trees.

You should use Apple's native @Observable macro instead of MVVM when your SwiftUI project aligns with native patterns and requires less boilerplate. Architecture selection guidance helps determine if native patterns fit your specific feature needs better than traditional MVVM.

Common SwiftUI architecture anti-patterns include placing networking code directly in views and failing to separate logic into appropriate layers. Recognizing these anti-patterns helps developers avoid structural pitfalls and maintain effective codebase organization.