cocos2d-x按钮菜单（cocos2d-x2.1）

首先看看程序运行时：

程序中有四种菜单项按钮：文本菜单项（stop walk），图字菜单项（Hide Bear），Toggle菜单项（Go Right）以及图片菜单（程序开关）。

为了有直观的显示，本程序在上一篇博客（动画制作）基础上修改。

cocos2d-x的菜单CCMenu的创建有几个步骤

1. 创建菜单项（CCMenuItem），并设置位置、点击回调函数。CCMenuItemImage，CCMenuItemLabel，CCMenuItemToggle

2. 将菜单项添加到菜单创建的参数中，并为菜单设置位置、添加到层。

例如：

////////////////////////////////////////////////////////////////////////////// 菜单创建        // 图片菜单按钮项        CCMenuItemImage *pCloseItem = CCMenuItemImage::create(            "CloseNormal.png",            "CloseSelected.png",            this,            menu_selector(HelloWorld::menuCloseCallback));        CC_BREAK_IF(! pCloseItem);        pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20, 20));//Pause Resume菜单LabelpStopLabel = CCLabelTTF::create("Stop Walk!", "Arial", 20);pShowLabel = CCLabelBMFont::create("Hide Bear", "Arial.fnt");CCMenuItemLabel* pItemLabel = CCMenuItemLabel::create(pStopLabel, this, menu_selector(HelloWorld::menuStopCallback));CCMenuItemLabel* pItemLabel2 = CCMenuItemLabel::create(pShowLabel, this, menu_selector(HelloWorld::menuShowCallback));pItemLabel->setPosition(ccp(winSize.width * 0.5 - 60, winSize.height * 0.8));pItemLabel2->setPosition(ccp(winSize.width * 0.5 + 60, winSize.height * 0.8));CCMenuItemFont::setFontName("Arial");CCMenuItemFont::setFontSize(20);CCMenuItemToggle* pItemToggle = CCMenuItemToggle::createWithTarget(this, menu_selector(HelloWorld::menuTogglItemCallback),  CCMenuItemFont::create("Go Right"), CCMenuItemFont::create("Go Left"), NULL);pItemToggle->setPosition(ccp(winSize.width * 0.5, winSize.height * 0.2));CCMenu *pMenu = CCMenu::create(pCloseItem, pItemLabel, pItemLabel2, pItemToggle, NULL);pMenu->setPosition(CCPointZero);CC_BREAK_IF(!pMenu);this->addChild(pMenu);

本程序的HelloWorld代码：

#ifndef __HELLOWORLD_SCENE_H__#define __HELLOWORLD_SCENE_H__#include "cocos2d.h"#include "SimpleAudioEngine.h"class HelloWorld : public cocos2d::CCLayer{public:HelloWorld();virtual ~HelloWorld();    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone    virtual bool init();      // there's no 'id' in cpp, so we recommand to return the exactly class pointer    static cocos2d::CCScene* scene();        // a selector callback    void menuCloseCallback(CCObject* pSender);    // implement the "static node()" method manually    CREATE_FUNC(HelloWorld);cocos2d::CCSpriteBatchNode *_actors;cocos2d::CCSprite *_bear;// menu callbackvoid menuStopCallback(CCObject* sender);void menuShowCallback(CCObject* sender);void menuTogglItemCallback(CCObject* sender);protected:bool bLabelBtnStop;bool bSpriteIsShow;bool bGoLeft;cocos2d::CCLabelTTF* pStopLabel;cocos2d::CCLabelBMFont* pShowLabel;};#endif  // __HELLOWORLD_SCENE_H__

#include "HelloWorldScene.h"using namespace cocos2d;HelloWorld::HelloWorld(){_actors = NULL;_bear = NULL;bLabelBtnStop = true;bSpriteIsShow = true;pStopLabel = NULL;pShowLabel = NULL;bGoLeft = true;}HelloWorld::~HelloWorld(){}CCScene* HelloWorld::scene(){    CCScene * scene = NULL;    do     {        // 'scene' is an autorelease object        scene = CCScene::create();        CC_BREAK_IF(! scene);        // 'layer' is an autorelease object        HelloWorld *layer = HelloWorld::create();        CC_BREAK_IF(! layer);        // add layer as a child to scene        scene->addChild(layer);    } while (0);    // return the scene    return scene;}// on "init" you need to initialize your instancebool HelloWorld::init(){    bool bRet = false;    do     {        CC_BREAK_IF(! CCLayer::init());CCSize winSize = CCDirector::sharedDirector()->getWinSize();////////////////////////////////////////////////////////////////////////////// 菜单        // 图片菜单按钮项        CCMenuItemImage *pCloseItem = CCMenuItemImage::create(            "CloseNormal.png",            "CloseSelected.png",            this,            menu_selector(HelloWorld::menuCloseCallback));        CC_BREAK_IF(! pCloseItem);        pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20, 20));//Pause Resume菜单LabelpStopLabel = CCLabelTTF::create("Stop Walk!", "Arial", 20);pShowLabel = CCLabelBMFont::create("Hide Bear", "Arial.fnt");CCMenuItemLabel* pItemLabel = CCMenuItemLabel::create(pStopLabel, this, menu_selector(HelloWorld::menuStopCallback));CCMenuItemLabel* pItemLabel2 = CCMenuItemLabel::create(pShowLabel, this, menu_selector(HelloWorld::menuShowCallback));pItemLabel->setPosition(ccp(winSize.width * 0.5 - 60, winSize.height * 0.8));pItemLabel2->setPosition(ccp(winSize.width * 0.5 + 60, winSize.height * 0.8));CCMenuItemFont::setFontName("Arial");CCMenuItemFont::setFontSize(20);CCMenuItemToggle* pItemToggle = CCMenuItemToggle::createWithTarget(this, menu_selector(HelloWorld::menuTogglItemCallback),  CCMenuItemFont::create("Go Right"), CCMenuItemFont::create("Go Left"), NULL);pItemToggle->setPosition(ccp(winSize.width * 0.5, winSize.height * 0.2));CCMenu *pMenu = CCMenu::create(pCloseItem, pItemLabel, pItemLabel2, pItemToggle, NULL);pMenu->setPosition(CCPointZero);CC_BREAK_IF(!pMenu);this->addChild(pMenu);////////////////////////////////////////////////////////////////////////////////////////////////////////// add bear animationCCSpriteFrameCache *cache = CCSpriteFrameCache::sharedSpriteFrameCache();cache->addSpriteFramesWithFile("Bears.plist");_actors = CCSpriteBatchNode::create("Bears.png");this->addChild(_actors);_bear = CCSprite::createWithSpriteFrameName("bear1.png");_bear->setPosition(ccp(winSize.width / 2, winSize.height / 2 ));_actors->addChild(_bear);// 为每帧创建图片CCArray *walkFrames = CCArray::createWithCapacity(8);for (int i = 1; i <= 8; i++){CCSpriteFrame *frame = cache->spriteFrameByName(CCString::createWithFormat("bear%1d.png", i)->getCString());walkFrames->addObject(frame);}// 创建动画CCAnimation *walkAnimation = CCAnimation::createWithSpriteFrames(walkFrames, 1.0f / 12.0f);CC_BREAK_IF(!walkAnimation);CCAnimate* walkAnimate = CCAnimate::create(walkAnimation);CC_BREAK_IF(!walkAnimate);// 运行动画动作_bear->runAction(CCRepeatForever::create(walkAnimate));        bRet = true;    } while (0);    return bRet;}void HelloWorld::menuCloseCallback(CCObject* pSender){    // "close" menu item clicked    CCDirector::sharedDirector()->end();}void HelloWorld::menuStopCallback(CCObject* pSender){if (bLabelBtnStop){_bear->pauseSchedulerAndActions();bLabelBtnStop = false;pStopLabel->setString("Go Walk");}else{_bear->resumeSchedulerAndActions();bLabelBtnStop = true;pStopLabel->setString("Stop Walk");}}void HelloWorld::menuShowCallback(CCObject* sender){if (bSpriteIsShow){_bear->setVisible(false);pShowLabel->setString("Show Bear");bSpriteIsShow = false;}else{_bear->setVisible(true);pShowLabel->setString("Hide Bear");bSpriteIsShow = true;}}void HelloWorld::menuTogglItemCallback(CCObject* sender){if (bGoLeft){_bear->setScaleX(-1);bGoLeft = false;}else{_bear->setScaleX(1);bGoLeft = true;}}