Com.Sibz.EditorList

This packages enables lists that can be nicely displayed in the editor. It's fully extensible.

Contains two implementations:

• UnorderedGameObjectList
• OrderedGameObjectList

Both are very similar, they display a list of game objects, however the ordered one has ordering buttons.

Usage

using UnityEditor;
using UnityEngine;

public class MyTestMono : MonoBehaviour
{
   public UnorderedGameObjectList GameObjectsList1;
   public OrderedGameObjectList GameObjectsList2;
}

// This is required to enable the use of GUILayout. Can also be put in own file.
#if UNITY_EDITOR
[CustomEditor(typeof(MyTestMono)), CanEditMultipleObjects]
public class MyTestMonoCI : Editor{}
#endif

This should give you something similar to:

List of Custom (Unity)Objects

Implement as above but define your own EditList and ObjectListDrawer. T Must derive from UnityEngine.Object.

OrderedColliderList.cs

using System;
using UnityEngine;
using Sibz.EditorList;

[Serializable]
public class OrderedColliderList : EditorList<Collider> { }

OrderedColliderListDrawer.cs

using Sibz.EditorList.Editor;
using UnityEditor;

[CustomPropertyDrawer(typeof(OrderedColliderList))]
public class OrderedColliderListDrawer : ObjectListDrawer<Collider> { }

List of anything

Anything can be listed, you either have to write a custom property drawer for the object you are listing, or override the default ListView.

1. If you made your CustomPropertyDrawer for the property on the list:

[Serializable]
public class CustomObject {
   public string Name;
};

[Serializable]
public class OrderedCustomObjectList : EditorList<CustomObject> { }

Note overriding ListDrawer here (not ObjectListDrawer):

[CustomPropertyDrawer(typeof(OrderedCustomObjectList))]
public class CustomObjectListDrawer : ListDrawer<CustomObject> { }

2. If you want to do your own thing for the item, then you have to override ListDrawer.ListItemDrawer:

[CustomPropertyDrawer(typeof(OrderedCustomObjectList))]
public class CustomObjectListDrawer : ListDrawer<CustomObject>
{
  protected override void ListItemDrawer(SerializedProperty listProperty, SerializedProperty listItemProperty, int index)
  {
      EditorGUILayout.LabelField(listItemProperty.FindPropertyRelative("Name").stringValue);
  }
}

Custom List Result: