Unity Editor拓展編輯器大全

一. 拓展Project視圖

1. 右鍵菜單

	[MenuItem("Assets/My Tools/Tools 1", false, 2)]
	static void MyTools1()
	{
		Debug.Log(Selection.activeObject.name);
	}

2. 拓展布局

	[InitializeOnLoadMethod]
	static void InitializeOnLoadMethod()
	{
		EditorApplication.projectWindowItemOnGUI = delegate (string guid, Rect selectionRect) {
			//在Project視圖中選擇一個資源
			if (Selection.activeObject &&
				guid == AssetDatabase.AssetPathToGUID(AssetDatabase.GetAssetPath(Selection.activeObject)))
			{
				//設置拓展按鈕區域
				float width = 50f;
				selectionRect.x += (selectionRect.width - width);
				
				selectionRect.width = width;
				GUI.color = Color.yellow;
				//點擊事件
				if (GUI.Button(selectionRect, "click"))
				{
					Debug.LogFormat("click : {0}", Selection.activeObject.name);
				}
				GUI.color = Color.white;
			}
		};
	}

二. 拓展Hierarchy視圖

1. 右鍵菜單

	[MenuItem("GameObject/My Create/Cube",false,0)]
	static void CreateCube()
	{
		GameObject.CreatePrimitive (PrimitiveType.Cube); //創建立方體
	}

2. 拓展布局

	[InitializeOnLoadMethod]
	static void InitializeOnLoadMethod()
	{
		EditorApplication.hierarchyWindowItemOnGUI = delegate (int instanceID, Rect selectionRect) {
			//在Hierarchy視圖中選擇一個資源
			if (Selection.activeObject &&
				instanceID == Selection.activeObject.GetInstanceID())
			{
				//設置拓展按鈕區域
				float width = 50f;
				float height = 18f;
				selectionRect.x += (selectionRect.width - width);
				selectionRect.width = width;
				selectionRect.height = height;
				GUI.color = Color.yellow;
				//點擊事件
				if (GUI.Button(selectionRect, "click"))
				{
					Debug.LogFormat("click : {0}", Selection.activeObject.name);
				}
				GUI.color = Color.white;
			}
		};
	}

三. 拓展Inspector視圖

1. 拓展組件

using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(Camera))]
public class EditorTest : Editor
{
	public override void OnInspectorGUI()
	{
		if (GUILayout.Button("拓展按鈕"))
		{
		}
		base.OnInspectorGUI();
	}
}

2. 拓展Context菜單

	[MenuItem("CONTEXT/Transform/New Context 1")]
	public static void NewContext1(MenuCommand command)
	{
		//獲取對象名
		Debug.Log(command.context.name);
	}

四. 拓展Scene視圖

1. 畫線或3D物體

using UnityEngine;

public class Test : MonoBehaviour
{
	void OnDrawGizmosSelected()
	{
		Gizmos.color = Color.red;
		//畫線
		Gizmos.DrawLine(transform.position, Vector3.one);
		//立方體
		Gizmos.DrawCube(Vector3.one, Vector3.one);
	}

	void OnDrawGizmos()
	{
		Gizmos.DrawSphere(transform.position, 1);
	}
}

2. 畫GUI

using System.Collections;
using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(Camera))]
public class EditorTest : Editor
{
	void OnSceneGUI()
	{
		Camera camera = target as Camera;
		if (camera != null)
		{
			Handles.color = Color.red;
			Handles.Label(camera.transform.position, camera.transform.position.ToString());

			Handles.BeginGUI();
			GUI.backgroundColor = Color.red;
			if (GUILayout.Button("click", GUILayout.Width(200f)))
			{
				Debug.LogFormat("click = {0}", camera.name);
			}
			GUILayout.Label("Label");
			Handles.EndGUI();
		}
	}
}

using UnityEngine;
using UnityEditor;

public class EditorTest
{
	[InitializeOnLoadMethod]
	static void InitializeOnLoadMethod()
	{
		SceneView.duringSceneGui += delegate (SceneView sceneView) {
			Handles.BeginGUI();

			GUI.Label(new Rect(0f, 0f, 50f, 15f), "標題");
			GUI.Button(new Rect(0f, 20f, 50f, 20f), "click");


			Handles.EndGUI();
		};
	}
}

五. 拓展頂部菜單

1. 帶勾選的菜單

	[MenuItem("MenuTest/Test", false, 3)]
	static void Test3()
	{
		//勾選中框的菜單
		var menuPath = "MenuTest/Test";
		bool mchecked = Menu.GetChecked(menuPath);
		Menu.SetChecked(menuPath, !mchecked);
	}

2. 帶快捷鍵的菜單

	[MenuItem("Assets/HotKey %#d",false,-1)]
	private static void HotKey()
	{
		Debug.Log ("Command Shift + D");
	}

其他快捷鍵：
%：表示Windows的Ctrl鍵和macOS下的Command鍵
#：表示Shift鍵
&：表示Alt鍵
LEFT / RIGHT / UP / DOWN：表示四個方向鍵
HOME / END / PGUP / PGDN：表示對應的鍵