Is it possible to find a script instance by the interface type

Questions & Answers
1

I have several scenes where each scene has a GameObject with a single script attached to it, where that script implements some interface.

Is there a way to find the GameObject instance, searching by interface type?

3

If you’re using an old version of Unity, just use LINQ.

using System.Linq;   
...    
    var comps = GetComponents<MonoBehaviour>().OfType<MyInterface>();

If you’re looking for something that isn’t a subclass of MonoBehaviour, then just broaden the search by replacing MonoBehaviour in the snippet above with Behaviour, or Component. You can use this same trick with FindObjectsOfType<T>().

2

FindObjectOfType will only works with components. I think you’ll need to find all the gameobjects in the scene and check if they implement that interface( with if( … is … ) ).

You could as well use a singleton.