unity-vcontainer

Dependency injection in Unity enables decoupled, testable architecture by registering services centrally and injecting them into components. VContainer provides high-performance IoC with constructor and method injection, lifetime management (Singleton, Transient, Scoped), and MonoBehaviour support through [Inject] attributes for clean, maintainable code.

Yes, VContainer supports MonoBehaviour injection via [Inject] attributes on fields and methods, enabling services to be resolved when instances are instantiated. This works alongside factories and lifetime scopes, allowing game objects to access registered services without manual instantiation or ServiceLocator patterns.

Lifetime scopes define how long a service instance persists: Singleton creates one instance for the app lifetime, Transient creates a new instance per request, and Scoped creates one per scope boundary. VContainer manages these scopes automatically, ensuring proper cleanup and resource efficiency across your Unity application.

Dependency injection enables testability by replacing real services with mocks during tests. VContainer supports constructor injection and multiple registrations, allowing test suites to configure alternative implementations without modifying game code, following SOLID principles for maintainable, mockable architecture.

VContainer supports both patterns: constructor injection for required dependencies and method injection via [Inject] for optional setup. Choose constructor injection for mandatory services and method injection for initialization-time configuration, adapting to your architecture's needs.

Register services in a container configuration class by specifying type, lifetime scope, and factory method if needed. VContainer resolves dependencies by type and scope, supporting both interface-to-implementation mappings and direct concrete registrations for flexible, maintainable service composition.