ReorderableList是可以通过手动拖拽更改列表顺序，例子如下：

image.png

using UnityEditorInternal;
using UnityEditor;
using System.Collections.Generic;

public class ReorderableListTest : EditorWindow {

    private ReorderableList _list;
    //应该用持久化数据，案例暂时用这个
    private List<string> _data = new List<string>();

    public ReorderableListTest()
    {
        _list = new ReorderableList(_data, _data.GetType());
        _list.drawElementCallback = (rect, index, isActive, isFocused) =>
        {
            EditorGUI.TextField(rect,_data[index]);
        };

        _list.onAddCallback = (list) => 
        {
            _data.Add("");
        };
    }

    private void OnGUI()
    {
        _list.DoLayoutList();
        //_list.DoList(rect);根据rect调整位置
    }
}