首页 > 代码库 > Unity3D研究之监听Hierachy、Project等视图结构变化的事件
Unity3D研究之监听Hierachy、Project等视图结构变化的事件
以前就有人问我怎么监听Hierarchy视图中创建或删除变化的事件，当时因为有别的事情就没研究这块。刚好最近有这一类的需求我就学习学习。网上发现了一个日本人写的文档，实现的原理很有意思，内容不错我就翻译一下。本文参考了一个游戏编程网的资料在此注明下。
请注意一定把这两个监听的脚本放在Editor文件夹下。
先是基类。
using System;using System.Collections;using System.Reflection;using UnityEditor;using UnityEngine; [InitializeOnLoad]public class EditorMonoBehaviour{ static EditorMonoBehaviour () { var type = Types.GetType ("UnityEditor.EditorAssemblies", "UnityEditor.dll"); var method = type.GetMethod ("SubclassesOf", BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Instance, null, new Type[]{ typeof(Type) }, null); var e = method.Invoke (null, new object[]{ typeof(EditorMonoBehaviour) }) as IEnumerable; foreach (Type editorMonoBehaviourClass in e) { method = editorMonoBehaviourClass.BaseType.GetMethod ("OnEditorMonoBehaviour", BindingFlags.NonPublic | BindingFlags.Instance); if (method != null) { method.Invoke (System.Activator.CreateInstance (editorMonoBehaviourClass), new object[0]); } } } private void OnEditorMonoBehaviour () { EditorApplication.update += Update; EditorApplication.hierarchyWindowChanged += OnHierarchyWindowChanged; EditorApplication.hierarchyWindowItemOnGUI += HierarchyWindowItemOnGUI; EditorApplication.projectWindowChanged += OnProjectWindowChanged; EditorApplication.projectWindowItemOnGUI += ProjectWindowItemOnGUI; EditorApplication.modifierKeysChanged += OnModifierKeysChanged; // globalEventHandler EditorApplication.CallbackFunction function = () => OnGlobalEventHandler (Event.current); FieldInfo info = typeof(EditorApplication).GetField ("globalEventHandler", BindingFlags.Static | BindingFlags.Instance | BindingFlags.NonPublic); EditorApplication.CallbackFunction functions = (EditorApplication.CallbackFunction)info.GetValue (null); functions += function; info.SetValue (null, (object)functions); EditorApplication.searchChanged += OnSearchChanged; EditorApplication.playmodeStateChanged += () => { if (EditorApplication.isPaused) { OnPlaymodeStateChanged (PlayModeState.Paused); } if (EditorApplication.isPlaying) { OnPlaymodeStateChanged (PlayModeState.Playing); } if (EditorApplication.isPlayingOrWillChangePlaymode) { OnPlaymodeStateChanged (PlayModeState.PlayingOrWillChangePlaymode); } }; } public virtual void Update () { } public virtual void OnHierarchyWindowChanged () { } public virtual void HierarchyWindowItemOnGUI (int instanceID, Rect selectionRect) { } public virtual void OnProjectWindowChanged () { } public virtual void ProjectWindowItemOnGUI (string guid, Rect selectionRect) { } public virtual void OnModifierKeysChanged () { } public virtual void OnGlobalEventHandler (Event e) { } public virtual void OnSearchChanged () { } public virtual void OnPlaymodeStateChanged (PlayModeState playModeState) { } public enum PlayModeState { Playing, Paused, Stop, PlayingOrWillChangePlaymode }}接着是继承类，所有监听的事件在这里完成，两个类都不用实例化也不用NEW直接就可以监听。
using UnityEditor;using UnityEngine;public class NewBehaviourScript : EditorMonoBehaviour{ public override void Update () { //Debug.Log ("每一帧回调一次"); } public override void OnPlaymodeStateChanged (PlayModeState playModeState) { //Debug.Log ("游戏运行模式发生改变， 点击 运行游戏 或者暂停游戏或者 帧运行游戏 按钮时触发: " + playModeState); } public override void OnGlobalEventHandler (Event e) { //Debug.Log ("全局事件回调: " + e); } public override void HierarchyWindowItemOnGUI (int instanceID, Rect selectionRect) { // Debug.Log (string.Format ("{0} : {1} - {2}", EditorUtility.InstanceIDToObject (instanceID), instanceID, selectionRect)); } public override void OnHierarchyWindowChanged () { Debug.Log ("层次视图发生变化"); } public override void OnModifierKeysChanged () { // Debug.Log ("当触发键盘事件"); } public override void OnProjectWindowChanged () { // Debug.Log ("当资源视图发生变化"); } public override void ProjectWindowItemOnGUI (string guid, Rect selectionRect) { //根据GUID得到资源的准确路径 //Debug.Log (string.Format ("{0} : {1} - {2}", AssetDatabase.GUIDToAssetPath (guid), guid, selectionRect)); }}思考：因为在这里我们只能得到它变化的事件，但是我们不知道哪个GameObject变化了。所以我觉得可以自己写一段代码来对比一下前后。 欢迎在下面给我留言，讨论与学习。谢谢。
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