下一节开始要用cocostudio制作主界面，为了使用最新版的Cocos Studio2.1，需要将引擎升级到3.4.

下面是3.4的升级说明。对于我们的项目来说，机会没什么影响，所以只需要用新引擎创建一个工程，

我们甚至只需要将classes，resource进行简单地覆盖就可以完成引擎升级。

更加优化的渲染流程：改进了2D和3D渲染，《Fantasy Warrior3D》现在不需要hack引擎就可以运行

视锥体裁剪功能：通过计算裁剪掉在屏幕上不可见物体，降低渲染开销，为4.0的全3D和大规模场景提供支持

在这一节里，我从Evakaka大神的博客里学到不少东西，以前我做遮罩从来没用过这样的

方式，现在想起来，真是既简单有粗暴，实在惭愧。

总的来说，这以功能实现起来，在原理上还是非常显而易见的，只不过在具体的实现上，还

是要见仁见智。

主要来说，我们需要新建一个Scene，当我们按下暂定按钮时，见我们新建的这个Scene push出来，

，之所以不用replaceScene是因为，我们总不能一按暂定按钮回来的时候游戏就重新开始吧。

GamepauseScene.h

//
//  GamepauseScene.h
//  Fight
//
//  Created by Cytzrs on 15/2/5.
//
//

#ifndef __Fight__GamepauseScene__
#define __Fight__GamepauseScene__

#include <iostream>
#include "cocos2d.h"
#include "cocos-ext.h"
USING_NS_CC_EXT;
USING_NS_CC;
class GamepauseScene : public Layer
{
public:
    static Scene* createScene(RenderTexture*);
    bool init();
    CREATE_FUNC(GamepauseScene);
    void attackAct1(Ref *sender,Control::EventType controlEvent);
    void attackAct2(Ref *sender,Control::EventType controlEvent);
    void attackAct3(Ref *sender,Control::EventType controlEvent);
//private:
//    ControlButton* attackBtn1;
//    ControlButton* attackBtn2;
//    ControlButton* attackBtn3;
};

#endif /* defined(__Fight__GamepauseScene__) */

//
//  GamepauseScene.cpp
//  Fight
//
//  Created by Cytzrs on 15/2/5.
//
//

#include "GamepauseScene.h"
#include "cocos-ext.h"
USING_NS_CC_EXT;
#include "HelloWorldScene.h"
Scene* GamepauseScene::createScene(RenderTexture* render)
{
    auto scene = Scene::create();
    auto layer = GamepauseScene::create();
    scene->addChild(layer,1);
    
    auto s = Director::getInstance()->getVisibleSize();
    auto bg = Sprite::createWithTexture(render->getSprite()->getTexture());
    bg->setPosition(s/2);
    bg->setFlippedY(true);
    bg->setColor(cocos2d::Color3B::GRAY);
    
    scene->addChild(bg);

    return scene;
}

bool GamepauseScene::init()
{
    while(1)
    {
        if(!Layer::init())
            return false;
        auto s = Director::getInstance()->getVisibleSize();
        
        ControlButton* attackBtn1 = ControlButton::create("继续游戏","fonts/Marker Felt.ttf",30);
        attackBtn1->setPosition(s/2);
        this->addChild(attackBtn1,7);
        attackBtn1->addTargetWithActionForControlEvents(this,cccontrol_selector(GamepauseScene::attackAct1),Control::EventType::TOUCH_DOWN);
        
        ControlButton* attackBtn2 = ControlButton::create("重新游戏",30);
        attackBtn2->setPosition(s.width/2,s.height/2-100);
        this->addChild(attackBtn2,7);
        attackBtn2->addTargetWithActionForControlEvents(this,cccontrol_selector(GamepauseScene::attackAct2),Control::EventType::TOUCH_DOWN);
        
        ControlButton* attackBtn3 = ControlButton::create("回到主界面",30);
        attackBtn3->setPosition(s.width/2,s.height/2-200);
        this->addChild(attackBtn3,7);
        attackBtn3->addTargetWithActionForControlEvents(this,cccontrol_selector(GamepauseScene::attackAct3),Control::EventType::TOUCH_DOWN);
//
//        attackBtn2 = ControlButton::create("ATTACK",30);
//        attackBtn2->setPosition(Vec2(visibleSize.width-200,100));
//        this->addChild(attackBtn2,7);
//        
//        attackBtn3 = ControlButton::create("ATTACK",30);
//        attackBtn3->setPosition(Vec2(visibleSize.width-200,100));
//        this->addChild(attackBtn3,7);
        
        return true;
    }
    return false;
}

void GamepauseScene::attackAct1(Ref *sender,Control::EventType controlEvent)
{
//    auto scene = HelloWorld::createScene();
    Director::getInstance()->popScene();
}

void GamepauseScene::attackAct2(Ref *sender,Control::EventType controlEvent)
{
        auto scene = HelloWorld::createScene();
    Director::getInstance()->replaceScene(scene);
}

void GamepauseScene::attackAct3(Ref *sender,Control::EventType controlEvent)
{
    //    auto scene = HelloWorld::createScene();
    //现在还没有创建主界面，暂且留白
    Director::getInstance()->popScene();
}

PS:多写博客，帮助自己，方便他人！