Getting dependencies from loaded scenes in unity

[Antoshidza]

I'm designing a simple mobile unity app. I want to have start scene AppStartScene and AppController with general for app logic (guess most devs see that solution as a common). Then, for example, after AppStartScene and some loading scene, which contains no dependencies, I want to load MainMenuScene where I have MainMenuController and MainMenuView. I want my AppController to get dependency of MainMenuController after scene is loaded.

So basically my question is: how can I obtain lately registered dependencies for once resolved instance?

[gustavopsantos]

At AppStartScene create all the dependencies you want for your MainMenuScene scene before even loading MainMenuScene, and then, use the following instructions to add the dependencies you just instantiated to the container.

var scene = SceneManager.LoadScene("MainMenuScene", new LoadSceneParameters(LoadSceneMode.Single));
ReflexSceneManager.PreInstallScene(scene, builder => builder.AddSingleton(MainMenuControllerInstance and MainMenuViewInstance));

[Antoshidza]

As I understand in this example we gonna inject dependencies into MainMenuScene scene after load it. But what If I have some complex hierarchy which I don't want to have as a prefabs but do want to inject back to AppController?

Asking because MainMenuView instance is inside MainMenuScene scene, otherwise there is no need in scene if I would use prefabs to show main menu.

[gustavopsantos]

So it seems in your case it depends on your implementation. Basically the container heirarchy is almost fully flat, except that all scene container inherits from the project container. Knowing that, "dependencies" on scene containers can depend on "dependencies" from project container, but the opposite is not true.

Container Hierarchy Example:

  graph TD;
      ProjectContainer-->SceneOneContainer;
      ProjectContainer-->SceneTwoContainer;
      ProjectContainer-->SceneThreeContainer;

Loading

[Antoshidza]

Ok, I see, so if I want my AppController react to something, for example pressing Exit button, I rather need to implement some IExitHandler on AppController and just broadcast signal from exit point.

[Antoshidza]

What you've used to attach interactive diagram?

[gustavopsantos]

@Antoshidza
I used mermaid, heres the docs https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams