在Unity编辑模式下运行Mono中的方法

[ExecuteAlways]

最简单的方法当然是直接给Mono加上[ExecuteAlways]修饰，这样Mono中的Awake，Update等等都可以在编辑模式下按照原本的时机运行。

[ExecuteAlways]
public class TestScript : MonoBehaviour {void TestMethod(){Debug.Log("TestMethod");}void Update(){TestMethod();}
}

OnValidate

除了ExecuteAlways以外，还可以用OnValidate，OnValidate 方法会在脚本中的变量发生更改时自动调用，适用于与 Inspector 参数联动的逻辑。

public class TestScript : MonoBehaviour {public float value;private void OnValidate(){// 在编辑器中参数变更时自动调用Debug.Log($"Value changed to: {value}");}
}

OnDrawGizmos+SceneView.RepaintAll()

有的时候如果想让某段代码能在编辑模式下像Update一样一直运行，但又不想用[ExecuteAlways]或者觉得没必要，就可以用这个方法，需要在SceneView里打开Gizmos的开关

public class TestScript : MonoBehaviour {void TestMethod(){Debug.Log("TestMethod");}//force update on editormodevoid OnDrawGizmos() {if (!Application.isPlaying) {//call you methodTestMethod();}//force Repaintif (!Application.isPlaying) {UnityEditor.EditorApplication.QueuePlayerLoopUpdate();UnityEditor.SceneView.RepaintAll();}}
}

扩展

一般来说上面提到的几个算是够用了，但我在使用OnDrawGizmos方法的时候，依旧觉得太麻烦，就没有什么更方便的方法吗，于是我想到了C#的Attribute，如果可以像[ExecuteAlways]那样简单的标记一个方法，让这方法可以不断的被调用，那写起来不就方便多了吗，于是

EditorUpdateMethodManager

//==============================================================================
// Filename:     EditorUpdateMethodManager
// Description:  
//               
// Version:      1.0
// Compiler:     2022.3.40f1 (cbdda657d2f0)
// Author:       Akota
// CreateTime:   2024-12-02 10:14:40
//==============================================================================
using System;
using UnityEngine;
#if UNITY_EDITOR
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using UnityEditor;
#endif[ExecuteAlways]
public class EditorUpdateMethodManager : MonoBehaviour {private void Awake() {if (Application.isPlaying) {Destroy(gameObject);}}
#if UNITY_EDITORprivate  List<RegisteredMethod> RegisteredMethods = new List<RegisteredMethod>();private void OnEnable() {if (!Application.isPlaying) { RegisterMethodsFromScene();EditorApplication.hierarchyChanged += RegisterMethodsFromScene; // 监听层级变化}}private void OnDisable() {if (!Application.isPlaying) { EditorApplication.hierarchyChanged -= RegisterMethodsFromScene; // 移除监听}}private void Update() {if (!Application.isPlaying) { foreach (var registeredMethod in RegisteredMethods) {// 仅调用激活的 MonoBehaviour 实例上的方法if (registeredMethod.MonoInstance != null &&registeredMethod.MonoInstance.enabled &&registeredMethod.MonoInstance.gameObject.activeInHierarchy) {registeredMethod.Method.Invoke(registeredMethod.MonoInstance, null);}}}}/// <summary>/// 注册当前场景中的所有标记方法/// </summary>public void RegisterMethodsFromScene() {RegisteredMethods.Clear();// 获取当前场景中所有 MonoBehaviourvar monoBehaviours = FindObjectsOfType<MonoBehaviour>(true); // 包括未激活的对象foreach (var mono in monoBehaviours) {// 查找带有 RegisterEditorUpdateMethodAttribute 的方法var methods = mono.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).Where(m => m.GetCustomAttribute<EditorUpdateMethodAttribute>() != null);foreach (var method in methods) {// 记录方法和实例RegisteredMethods.Add(new RegisteredMethod(mono, method));}}}/// <summary>/// 注册方法信息/// </summary>private class RegisteredMethod {public MonoBehaviour MonoInstance { get; }public MethodInfo Method { get; }public RegisteredMethod(MonoBehaviour monoInstance, MethodInfo method) {MonoInstance = monoInstance;Method = method;}}
#endif
}/// <summary>
/// 标记可以被 EditorUpdateMethodManager 调用的方法
/// </summary>
[AttributeUsage(AttributeTargets.Method)]
public class EditorUpdateMethodAttribute : Attribute {
}

原理也很简单，就是利用[ExecuteAlways]来标记EditorUpdateMethodManager，然后在EditorUpdateMethodManager里面查找当前场景下的所有Mono里被EditorUpdateMethod标记的方法，并在Manager的Update中统一调用。

示例

public class TestScript : MonoBehaviour {[EditorUpdateMethod]void TestMethod(){Debug.Log("TestMethod");}
}

要是手动在场景里创建一个Manager还是嫌麻烦的话

EditorUpdateManagerInitializer

//==============================================================================
// Filename:     EditorUpdateManagerInitializer
// Description:  
//               
// Version:      1.0
// Compiler:     2022.3.40f1 (cbdda657d2f0)
// Author:       Akota
// CreateTime:   2024-12-02 10:16:02
//==============================================================================
#if UNITY_EDITOR
using System;
using System.Linq;
using System.Reflection;
using UnityEngine;
using UnityEditor;
using UnityEditor.SceneManagement;[InitializeOnLoad]
public static class EditorUpdateManagerInitializer {static EditorUpdateManagerInitializer() {// 监听层级变化EditorApplication.hierarchyChanged += EnsureEditorUpdateMethodManagerExists;EnsureEditorUpdateMethodManagerExists(); // 初次调用}/// <summary>/// 检查场景中是否存在标记方法，并确保 EditorUpdateMethodManager 存在/// </summary>private static void EnsureEditorUpdateMethodManagerExists() {// 检查场景中是否存在 EditorUpdateMethodManagervar existingManager = GameObject.FindObjectOfType<EditorUpdateMethodManager>();if (existingManager == null) { if (HasRegisterEditorUpdateMethodsInScene()) {// 没有 EditorUpdateMethodManager，创建一个var managerObject = new GameObject("EditorUpdateMethodManager");managerObject.AddComponent<EditorUpdateMethodManager>();// 标记场景为脏Undo.RegisterCreatedObjectUndo(managerObject, "Create EditorUpdateMethodManager");EditorSceneManager.MarkSceneDirty(EditorSceneManager.GetActiveScene());Debug.Log("[EditorUpdateManagerInitializer] 自动创建了 EditorUpdateMethodManager");}}else {// 如果不需要且已有 Manager，则移除//Debug.Log("[EditorUpdateManagerInitializer] 场景中没有标记方法，移除了 EditorUpdateMethodManager");//Undo.DestroyObjectImmediate(existingManager.gameObject);//EditorSceneManager.MarkSceneDirty(EditorSceneManager.GetActiveScene());}}/// <summary>/// 检查场景中是否有被 RegisterEditorUpdateMethodAttribute 标记的方法/// </summary>private static bool HasRegisterEditorUpdateMethodsInScene() {// 获取当前场景中所有 MonoBehaviourvar monoBehaviours = GameObject.FindObjectsOfType<MonoBehaviour>(true); // 包括未激活的对象foreach (var mono in monoBehaviours) {// 检查该 MonoBehaviour 类型是否有标记的方法var methods = mono.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).Where(m => m.GetCustomAttribute<EditorUpdateMethodAttribute>() != null);if (methods.Any()) {return true;}}return false;}
}
#endif

这段代码会自动检测场景中是否有被EditorUpdateMethod修饰的方法，有的话就自动创建Manager

更新

考虑到要在场景里创建物体，可能显得有点累赘，于是新版放弃[ExecuteAlways]，改为利用EditorApplication.update来实现，更精简了

//==============================================================================
// Filename:     EditorUpdateMethodManager
// Description:  
//               
// Version:      1.0
// Compiler:     2022.3.40f1 (cbdda657d2f0)
// Author:       Akota
// CreateTime:   2024-12-02 14:13:12
//==============================================================================
#if UNITY_EDITOR
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using UnityEditor;
using UnityEngine;public class EditorUpdateMethodManager{public static EditorUpdateMethodManager instance = null;[InitializeOnLoadMethod]public static void Init() {instance = new EditorUpdateMethodManager();}public EditorUpdateMethodManager() {if (!Application.isPlaying) {RegisterMethodsFromScene();}EditorApplication.hierarchyChanged += RegisterMethodsFromScene; // 监听层级变化EditorApplication.update += Update;}private List<RegisteredMethod> RegisteredMethods = new List<RegisteredMethod>();void Update() {if (!Application.isPlaying) {foreach (var registeredMethod in RegisteredMethods) {// 仅调用激活的 MonoBehaviour 实例上的方法if (registeredMethod.MonoInstance != null &&registeredMethod.MonoInstance.enabled &&registeredMethod.MonoInstance.gameObject.activeInHierarchy) {registeredMethod.Method.Invoke(registeredMethod.MonoInstance, null);}}}}/// <summary>/// 注册当前场景中的所有标记方法/// </summary>public void RegisterMethodsFromScene() {RegisteredMethods.Clear();// 获取当前场景中所有 MonoBehaviourvar monoBehaviours = Object.FindObjectsOfType<MonoBehaviour>(true); // 包括未激活的对象foreach (var mono in monoBehaviours) {// 查找带有 RegisterEditorUpdateMethodAttribute 的方法var methods = mono.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).Where(m => m.GetCustomAttribute<EditorUpdateMethodAttribute>() != null);foreach (var method in methods) {// 记录方法和实例RegisteredMethods.Add(new RegisteredMethod(mono, method));}}}/// <summary>/// 注册方法信息/// </summary>private class RegisteredMethod {public MonoBehaviour MonoInstance { get; }public MethodInfo Method { get; }public RegisteredMethod(MonoBehaviour monoInstance, MethodInfo method) {MonoInstance = monoInstance;Method = method;}}
}
#endif
/// <summary>
/// 标记可以被 EditorUpdateMethodManager 调用的方法
/// </summary>
[System.AttributeUsage(System.AttributeTargets.Method)]
public class EditorUpdateMethodAttribute : System.Attribute {
}

其他

还有其他的一些，比如编写CustomEditor，在Editor中一直调用方法，又或者用Editor画个按钮，通过在Inspector上手动点击来调用代码，当然也可以用Odin插件，直接用Button修饰Mono中的方法，就会在Inspector上出现按钮了。

结语

代码写的很随便也很丑陋，望包涵