dependency-injection

Each feature in modular Swift apps builds its own FeatureContainer for local dependencies like repositories, data sources, and view models. This container-based dependency injection approach enables modular growth and testable wiring without coupling features directly.

The best way to handle deep linking and navigation across iOS app features is routing resolution through a single AppContainer, ensuring centralized dependency injection and consistent navigation paths across your modular architecture.

To create a new feature using a composition root pattern in iOS, add a FeatureContainer, define a Feature struct that implements a FeatureContract, and wire its required dependencies directly within the central AppContainer.

Use a centralized composition root instead of scattered dependency injection in Swift to strictly enforce consistent public APIs, align feature-level containers, and guarantee testable wiring of shared services across your entire application.