GUI实现，如下：

按“G”键开始新手引导

代码如下：

using UnityEngine;using System.Collections;public class OkButton : GUIBase {    /// 
    /// 按钮图片    /// 
    public Texture2D OKBTN_a;    public Texture2D OKBTN_b;    /// 
    /// 引导图片    /// 
    public Texture2D HoleTexture;    private GUIStyle OKBTNStyle;    private GUIStyle _defaultStyle;    // Use this for initialization    public override void Start () {        base.Start();        OKBTNStyle = new GUIStyle();        _defaultStyle = new GUIStyle();        _defaultStyle.padding = new RectOffset(0, 0, 0, 0);        _defaultStyle.border = new RectOffset(0, 0, 0, 0);        if (OKBTN_a == null)        {            OKBTN_a = Resources.Load("OKBTN/OK_a") as Texture2D;            OKBTNStyle.normal.background = OKBTN_a;        }        if (OKBTN_b == null)        {            OKBTN_b = Resources.Load("OKBTN/OK_b") as Texture2D;            OKBTNStyle.active.background = OKBTN_b;        }        if (HoleTexture == null)            HoleTexture = Resources.Load("OKBTN/okfight") as Texture2D;    }        // Update is called once per frame    public override    void Update () {        base.Update();    }    private bool _isGuider = false;    void LateUpdate()    {        if (Input.GetKeyDown(KeyCode.G))        {            _isGuider = true;        }    }    public override void OnGUI()    {        base.OnGUI();             if (_isGuider) //引导        {            GUI.DrawTexture(new Rect(0, 0, 800, 480), HoleTexture);            Rect rect = new Rect(674, 355, 128, 128);            OkButton.AddHole(rect, _defaultStyle);            if (Event.current.type == EventType.MouseUp)            {                if (rect.Contains(Event.current.mousePosition))                {                    StartCoroutine(disCatch());                }            }        }        if (GUI.Button(new Rect(674, 355, 128, 128), "", OKBTNStyle))        {            print("Click OKBTN");            _isGuider = false;        }        if (GUI.Button(new Rect(0, 0, 128, 128), "", OKBTNStyle))        {            print("Click Other");        }    }    /// 
    /// 另外线程处理    /// 
    /// 
         IEnumerator disCatch()    {        //开一个线程处理要处理的事        yield return 1;    }    /// 
    /// 在界面上面开孔，只有此处可以点击，其余的地方屏蔽用户点击，即在该按钮四周加其他按钮，先加的按钮会在上层。后加的按钮被屏蔽。    /// 
    ///     public static void AddHole(Rect rect, GUIStyle style)    {        GUI.Button(new Rect(0, 0, GUIBase.DesignStageWidth, rect.y), "", style);//上面的button        GUI.Button(new Rect(0, rect.yMax, GUIBase.DesignStageWidth, GUIBase.DesignStageHeight - rect.yMax), "", style); //下边的button        GUI.Button(new Rect(0, rect.y, rect.x, rect.height), "", style);//左边        GUI.Button(new Rect(rect.xMax, rect.y, GUIBase.DesignStageWidth - rect.xMax, rect.height), "", style);//右边    }}