转载：http://blog.csdn.net/liqiangeastsun/article/details/42173669
Unity编辑器类在菜单栏创建一个按钮，点击按钮创建一个Window（窗口）

点击 “Improved copy buffer”跳出如下界面

点击 按钮

点击 “Clear all saves” 将所有缓存清除

在Editor文件夹下创建脚本 dfdff

using UnityEngine;  
using System.Collections;  
using UnityEditor;  
  
public class dfdff : EditorWindow {  
  
    public string[] savedCopies = new string[5];  //定义一个字符串数组  
    public bool load = false;                    
  
    [MenuItem("Examples/Improved copy buffer")] //在工具栏创建按钮  
    static void Init() {  
        dfdff window = (dfdff)EditorWindow.GetWindow(typeof(dfdff));  //定义一个窗口对象  
    }  
          
    void OnGUI() {  
        load = EditorGUILayout.Toggle("Load:", load); //创建一个 Toggle  
        EditorGUILayout.BeginHorizontal();  //开始水平布局  
        for (int i = 0; i < savedCopies.Length; i++)  
        {  
            if (GUILayout.Button(i.ToString())) // 创建这些按钮，并且当点击按钮时触发条件  
            {  
                if (load)  
                {  
                    EditorGUIUtility.systemCopyBuffer = savedCopies[i]; // 获取值  
                }  
                else  
                {  
                    savedCopies[i] = "123"; //给每一个字符串赋值  
                }  
            }  
        }  
        EditorGUILayout.EndHorizontal();  //结束水平布局  
  
        for (int j = 0; j < savedCopies.Length; j++)  
        {  
            EditorGUILayout.LabelField("Saved " + j, savedCopies[j]); //将所有已字符串以Label的形式显示出来  
        }  
              
        EditorGUILayout.LabelField("Current buffer:", EditorGUIUtility.systemCopyBuffer); //将获取的值以Label的形式显示出来  
        if(GUILayout.Button("Clear all saves"))  //清空所有的缓存  
        {  
            int i = 0;  
            foreach (string s in savedCopies)  
            {  
                savedCopies[i] = "";  
                i++;  
            }  
        }     
    }  
  
    void OnInspectorUpdate() {  
        this.Repaint();  //重新画窗口  
    }  
}