Unity编辑器-创建单独编辑框,折叠框,提示框

using UnityEngine;
using System.Collections;
using UnityEditor;

public class Test : EditorWindow {

private bool foldoutType;

[MenuItem("plateface/CreateWindows")]
static void CreateWinodw()
{
//在这里创建窗口
EditorWindow.GetWindow(typeof(Test),false,"EditorWindow",true);
}

void OnGUI()
{
//绘制折叠框
foldoutType = EditorGUILayout.Foldout (foldoutType,"Foldout");

//绘制成功就继续绘制
if(foldoutType)
{
EditorGUILayout.HelpBox("你创建了一个错误信息", MessageType.Error);
EditorGUILayout.HelpBox("HelpBox", MessageType.Info,false);        //不占据一行显示
EditorGUILayout.HelpBox("HelpBox", MessageType.None);
EditorGUILayout.HelpBox("HelpBox", MessageType.Warning);

}

foldoutType = EditorGUILayout.Foldout (foldoutType,"属性");

//绘制成功就继续绘制
if(foldoutType)
{
EditorGUILayout.HelpBox("你创建了一个错误信息", MessageType.Error);

}

}

}