Editor中侦听 Hierarchy 中发生变化

当hierarchy 中有物体被创建，重命名，改变父子关系或者被销毁时

EditorApplication.hierarchyWindowChanged

using UnityEditor;using UnityEngine;public class ExampleCode {[MenuItem ("Example/Hierarchy Window Changed")]static void Example () {EditorApplication.hierarchyWindowChanged += ExampleCallback;}static void ExampleCallback () {Object[] all = Resources.FindObjectsOfTypeAll (typeof (Object));Debug.Log ("There are " + all.Length + " objects at the moment.");}}