unity-dependency-injection

Dependency injection in Unity decouples logic by letting MonoBehaviours request interfaces through [Inject] attributes and receive concrete implementations via [Provide] attributes. This enables swappable components across scenes without hard references.

Dependency injection wiring occurs during the Awake phase, ensuring all requested dependencies are fully resolved and available before Start runs. This guarantees providers are ready for immediate use in your Unity components.

Attribute-based dependency injection supports C# game development by annotating fields with [Inject] to declare dependencies and using [Provide] to expose implementations. A DependencyInjector resolves these providers across scenes.

Debugging missing providers relies on built-in diagnostic logging that reports missing implementations and logs successful injections. This immediately highlights incomplete wiring during the Awake initialization phase.

The best way to set up a DependencyInjector is to attach a DependencyInjector object to a scene, annotate fields with [Inject], and expose providers using [Provide] to automate component wiring.

Unity dependency injection supports swappable components across scenes by decoupling high-level logic from concrete providers. Interfaces requested via [Inject] receive implementations through [Provide], allowing flexible scene transitions.