ReorderableList.list returns null in some Inspectors

Unity Engine
1

So here’s another fun one,

I’m creating some custom inspectors for an asset I’m creating and in some of them ReorderableList.list always returns null, even though it I’m sure exists. I can add and remove items, and even log the correct ReorderableList.count. I’ve tried accessing it in OnGUI(), during creation and inside the custom click handlers; all nada. Again though, this is only for ReorderableLists on some components; others work just fine.

So… what gives? Is there some quirk I’m missing?

2

ReorderableList has 2 constructors. One for a serializedObject and another for an IList.
If you’re creating the ReorderableList with a serializedObject, then list will be null.

You can check the source here: UnityCsReference/Editor/Mono/GUI/ReorderableList.cs at master · Unity-Technologies/UnityCsReference · GitHub

4 Likes
3

Aaaah, that makes sense! I just figured the list property would be an implicit getter to the underlying list or something. Thank you for the clarification!