MonoBehavior with List of MonoBehaviors

Unity Engine
1

Let’s say I have a MonoBehavior called Unit in an RPG, and he has a list of Move MonoBehaviors.

When editing the list in the Unit component in the Inspector, I would like to be able to edit the attributes of each Move in said list, in nested fashion in the Inspector. I would like to know how to achieve this. The goal is to have a neatly organized Inspector for Unit with its nested and modifiable Move MonoBehaviors. MonoBehaviors within MonoBehaviors, basically.

1 Like
2

The easiest thing is to create an editor for the nested monobehaviour, and call that editor’s OnInspectorGUI:

[CustomEditor(typeof(TestScript))]
public class TestScriptEditor : Editor {

   private TestScript parentBehaviour;
   private Editor[] childEditors;

   void OnEnable() {
      parentBehaviour = (TestScript) target;
      childEditors = new Editor[parentBehaviour.childBehaviours.Count];
      for (int i = 0; i < childEditors.Length; i++) {
         childEditors[i] = Editor.CreateEditor(parentBehaviour.childBehaviours[i]);
      }
   }

   public override void OnInspectorGUI() {
      base.OnInspectorGUI();
     
      foreach (var editor in childEditors) {
         editor.OnInspectorGUI();
      }

      // This needs to happen after the editors are drawn! OnInspectorGUI is called twice, once for
      // layout, another for actually drawing the things and taking input. If you do this before drawing the
      // sub inspectors, and add/remove sub inspectors, the number of inspectors drawn in the layout and
      // drawing phases are different, and Unity starts puking error messages in the console.
      childEditors = new Editor[parentBehaviour.childBehaviours.Count];
      for (int i = 0; i < childEditors.Length; i++) {
         childEditors[i] = CreateEditor(parentBehaviour.childBehaviours[i]);
      }       
   }
}

I’ll let you handle proper indentation and only updating the list of editors yourself.

3

Alternately - make your Move class not inherit from MonoBehaviour, decorate it with [Serializable] and the inspector will take care of itself (to an extent).