cocos2dx简单实现TabBarView功能

        #ifndef __HELLOWORLD_SCENE_H__
        #define __HELLOWORLD_SCENE_H__

        #include "cocos2d.h"

        USING_NS_CC;

        class HelloWorld : public cocos2d::Layer
        {
        public:
            // there‘s no ‘id‘ in cpp, so we recommend returning the class instance pointer
            static cocos2d::Scene* createScene();

            // Here‘s a difference. Method ‘init‘ in cocos2d-x returns bool, instead of returning ‘id‘ in cocos2d-iphone
            virtual bool init();

            // a selector callback
            void menuCloseCallback(cocos2d::Ref* pSender);

            // implement the "static create()" method manually
            CREATE_FUNC(HelloWorld);
        private:
            LayerMultiplex *layers;
            Menu *tabBarItems;
            Sprite *tabBarBg;

            void tapBarMenuPressed(Ref *pSender);

            virtual void onEnter();
        };

        #endif // __HELLOWORLD_SCENE_H__

    #include "HelloWorldScene.h"

    USING_NS_CC;
    #define TOOLBARTAG 10086

    Scene* HelloWorld::createScene()
    {
        // ‘scene‘ is an autorelease object
        auto scene = Scene::create();

        // ‘layer‘ is an autorelease object
        auto layer = HelloWorld::create();

        // add layer as a child to scene
        scene->addChild(layer);

        // return the scene
        return scene;
    }

    // on "init" you need to initialize your instance
    bool HelloWorld::init()
    {
        //////////////////////////////
        // 1. super init first
        if ( !Layer::init() )
        {
            return false;
        }

        auto layer1 = LayerColor::create(Color4B(180, 180, 0, 180));


        auto layer2 = LayerColor::create(Color4B(255, 255, 255, 180));


        auto layer3 = LayerColor::create(Color4B(0, 180, 180,  180));


        auto layer4 = LayerColor::create(Color4B(255, 255, 0, 180));

        layers = LayerMultiplex::create(layer1, layer2, layer3, layer4);

        this -> addChild(layers);

        //Menu背景图
        tabBarBg = Sprite::create("tarbarBg.png");
        tabBarBg -> setPosition(Director::getInstance() ->  getVisibleSize().width * 0.5, 0);
        tabBarBg -> setAnchorPoint(Point(0.5, 0));

        this -> addChild(tabBarBg, 1000);
        auto toolbar1 = MenuItemSprite::create(Sprite::create("toolbar1.png"), Sprite::create("toolbar1_p.png"), CC_CALLBACK_1(HelloWorld::tapBarMenuPressed, this));
        toolbar1 -> setTag(TOOLBARTAG + 0);

        auto toolbar2 = MenuItemSprite::create(Sprite::create("toolbar2.png"), Sprite::create("toolbar2_p.png"), CC_CALLBACK_1(HelloWorld::tapBarMenuPressed, this));
        toolbar2 -> setTag(TOOLBARTAG + 1);

        auto toolbar3 = MenuItemSprite::create(Sprite::create("toolbar3.png"), Sprite::create("toolbar3_p.png"), CC_CALLBACK_1(HelloWorld::tapBarMenuPressed, this));
        toolbar3 -> setTag(TOOLBARTAG + 2);

        auto toolbar4 = MenuItemSprite::create(Sprite::create("toolbar4.png"), Sprite::create("toolbar4_p.png"), CC_CALLBACK_1(HelloWorld::tapBarMenuPressed, this));
        toolbar4 -> setTag(TOOLBARTAG + 3);

        tabBarItems = Menu::create(toolbar1, toolbar2, toolbar3, toolbar4, NULL);
        tabBarItems -> alignItemsHorizontallyWithPadding(30);
        tabBarItems -> setPositionY(tabBarBg -> getContentSize().height * 0.5f);

        tabBarBg -> addChild(tabBarItems);


        return true;
    }

    void HelloWorld::onEnter()
    {
        Layer::onEnter();
        layers -> switchTo(0);
        static_cast<MenuItemSprite *>(tabBarItems -> getChildByTag(TOOLBARTAG + 0)) -> selected();
    }

    void HelloWorld::tapBarMenuPressed(Ref *pSender)
    {
        auto toolbar = (MenuItemSprite *)pSender;
        toolbar -> selected();
        layers -> switchTo(toolbar -> getTag() - TOOLBARTAG);

        for (int i = 0; i < tabBarItems -> getChildren().size(); i++) {
            auto tmpbar = dynamic_cast<MenuItemSprite *>(tabBarItems -> getChildren().at(i));
            if (tmpbar != NULL && tmpbar -> getTag() != toolbar -> getTag()) {
                tmpbar -> unselected();
            }
        }
    }