cocos2d x游戏开发系列教程 中国象棋03 主界面

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前情回顾

上个博客说道我们象棋程序进入了欢迎界面，在欢迎界面下等待一秒进入主界面

进入主界面的关键代码如下：

CCScene* pScene = CCMainMenu::scene();  创建scene

...

CCDirector::sharedDirector()->replaceScene(ps);  显示scene

最关键的是CCMainMenu::scene函数，说明后面要显示的scene类型是CCMainMenu类型的

所以接下来我们一起来看CCMainMenu是怎么回事

CCMainMenu

typedef struct{ CCSprite* pSprite; float x; // coordinate float y;}SPRITE_INFO;typedef std::vector<SPRITE_INFO> VEC_SPRITE;typedef VEC_SPRITE::iterator VEC_SPRITE_IT;class CCMainMenu : public CCLayer{public: static CCScene* scene(); virtual bool init(); CREATE_FUNC(CCMainMenu); virtual void ccTouchesEnded(CCSet* pTouches, CCEvent* pEvent);private: void  setPos(CCSprite* pSprite, int x, int y); void  setPosDigit(CCSprite* pSprite, int x, int y); void  menuCallBack(CCObject* pSender); void  menuRegret(CCObject* pSender); void  menuStart(CCObject* pSender); void  menuHardChoose(CCObject* pSender); void  menuSoundChoose(CCObject* pSender); void  updateTime(float dt); void  updateFocus(float dt); void  initCoordinate(); void  initListImage(); void  initTimeShow(); void  initChessPosition();  CCSprite* getNumberSprite(int nNum); void  setNumberSprite(int nChessTime); CCSprite* getListSprite(CHESS_TYPE nType); CHESS_TYPE  getChessType(int i, int j); void  dealWithChess(float x, float y); CCSprite* getChessByCoord(float x, float y); bool  getChessByCoord(float& x, float& y, short dt); void  collectInfo(CCSprite* pSprite); bool  judgeAction(int tx, int ty); void  freeOne(); void  freeAll(); bool  judgeContinuous(); void  clean(); bool  judgeWin(); //void  print();private: CCSprite* m_pFocus; CCSprite* m_pBKG; CCSprite* m_pMinute[2]; CCSprite* m_pSecond[2]; CCSprite* m_pCurChess; CCSprite*   m_pTargetChess; CHESS_TYPE  m_enCurChessType; CHESS_TYPE  m_enTarChessType; CCSprite* m_pChess[2][16]; CCMenuItemImage* m_pOpenVolice; CCMenuItemImage* m_pCloseVolice; //std::ofstream f_output; //std::string str; float  m_fPositionX; float  m_fPositionY; int   m_nChessTime; CCSize  s; bool  m_bSelect;   // has a chess be selected? if true, cannot be change bool  m_bVolice; bool  m_bCollectCorrect; int   ox, oy;    // the original coordinate of the current chess int   m_nContinuous;   // the max numbers to attact opponent's boss int   m_nCur;    // 0:red; 1:black int         m_nWin;    // 0:red; 1:black enum GAME_STATUS {  GAME_MENU,  GAME_RUNNING,  GAME_WIN,  GAME_OVER, }; GAME_STATUS m_enGameStatus; enum GAME_ROLE {  ROLE_RED,  ROLE_BLACK, }; GAME_ROLE m_enCurRole;  VEC_SPRITE m_vecSprite;};

oh，天，这个类太复杂了，对我们初学者来说，但是不要害怕，其他的我们先不管他是咋的，我们先来看基本的函数

一个是scene函数，一个是init函数。scene函数是创建函数，而init函数时初始化调用函数。

scene函数

CCScene* CCMainMenu::scene(){ CCScene* pScene = CCScene::create(); CCMainMenu* pLayer = CCMainMenu::create(); pScene->addChild(pLayer, 3); return pScene;}

scene函数和WelCome的scene函数类似，也是先创建一个scene，再创建一个CCMainMenu对象，然后把CCMainMenu对象加入到scene

最后返回scene

init函数

bool CCMainMenu::init(){ // 调用父类init函数 if (!CCLayer::init()) {  return false; } // 获取窗口大小，这个窗口大小将来用来计算控件位置等 s = CCDirector::sharedDirector()->getWinSize(); // 创建背景图片，并设置 m_pBKG = CCSprite::create(RES_PATH"background.png"); CCRect r = m_pBKG->getTextureRect(); m_pBKG->setAnchorPoint(CCPointZero); m_pBKG->setPosition(ccp(0, 0)); m_pBKG->setScaleX(s.width/r.size.width*0.667f); m_pBKG->setScaleY(s.height/r.size.height); this->addChild(m_pBKG, -2);  // 创建焦点图片精灵，这个焦点是指棋子被选中 m_pFocus = CCSprite::create(RES_PATH"selected.png"); r = m_pFocus->getTextureRect(); m_pFocus->setScaleX(0.667f); m_pFocus->setScaleY(0.6f); m_pFocus->setVisible(false); this->addChild(m_pFocus, 1); m_fPositionX = s.width - r.size.width*0.667f; m_fPositionY = s.height - r.size.height*0.6f; // 新局按钮 CCMenuItemImage* pItem = CCMenuItemImage::create(RES_PATH"new.jpg", RES_PATH"new.jpg", this, menu_selector(CCMainMenu::menuCallBack)); pItem->setPosition(ccp(m_fPositionX - s.width/6, m_fPositionY - s.height/8)); pItem->setAnchorPoint(CCPointZero); pItem->setScaleX(0.667f); pItem->setScaleY(0.6f);  CCMenu* pMenu = CCMenu::create(pItem, NULL); pMenu->setPosition(CCPointZero); this->addChild(pMenu, 1); // 悔棋按钮 pItem = CCMenuItemImage::create(RES_PATH"regret.jpg", RES_PATH"regret.jpg", this, menu_selector(CCMainMenu::menuRegret)); pItem->setPosition(ccp(m_fPositionX - s.width/6, m_fPositionY - s.height/8*2)); pItem->setAnchorPoint(CCPointZero); pItem->setScaleX(0.667f); pItem->setScaleY(0.6f); pMenu = CCMenu::create(pItem, NULL); pMenu->setPosition(CCPointZero); this->addChild(pMenu, 1); // 开始按钮 pItem = CCMenuItemImage::create(RES_PATH"start.jpg", RES_PATH"start.jpg", this, menu_selector(CCMainMenu::menuStart)); pItem->setPosition(ccp(m_fPositionX - s.width/6, m_fPositionY - s.height/8*3)); pItem->setAnchorPoint(CCPointZero); pItem->setScaleX(0.667f); pItem->setScaleY(0.6f);// pMenu = CCMenu::create(pItem, NULL); xueguoliang pMenu = CCMenu::create(pItem, NULL); pMenu->setPosition(CCPointZero); this->addChild(pMenu, 1); // 难度按钮 pItem = CCMenuItemImage::create(RES_PATH"difficulty.jpg", RES_PATH"difficulty.jpg", this, menu_selector(CCMainMenu::menuHardChoose)); pItem->setPosition(ccp(m_fPositionX - s.width/6, m_fPositionY - s.height/8*4)); pItem->setAnchorPoint(CCPointZero); pItem->setScaleX(0.667f); pItem->setScaleY(0.6f); pMenu = CCMenu::create(pItem, NULL); pMenu->setPosition(CCPointZero); this->addChild(pMenu, 1); // 声音按钮 m_pOpenVolice = CCMenuItemImage::create(RES_PATH"openVolice.png", RES_PATH"openVolice.png", this, menu_selector(CCMainMenu::menuSoundChoose)); CCSize r2 = m_pOpenVolice->getContentSize(); m_pOpenVolice->setPosition(ccp(m_fPositionX - s.width/6 + r.size.width/2 - r2.width/6, m_fPositionY - s.height/8*5)); m_pOpenVolice->setAnchorPoint(CCPointZero); m_pOpenVolice->setScaleX(0.667f); m_pOpenVolice->setScaleY(0.6f); pMenu = CCMenu::create(m_pOpenVolice, NULL); pMenu->setPosition(CCPointZero); this->addChild(pMenu, 1, 100); // 关闭声音按钮 m_pCloseVolice = CCMenuItemImage::create(RES_PATH"closeVolice.png", RES_PATH"closeVolice.png", this, menu_selector(CCMainMenu::menuSoundChoose)); m_pCloseVolice->setPosition(ccp(m_fPositionX - s.width/6 + r.size.width/2 - r2.width/6, m_fPositionY - s.height/8*5)); m_pCloseVolice->setAnchorPoint(CCPointZero); m_pCloseVolice->setScaleX(0.667f); m_pCloseVolice->setScaleY(0.6f); pMenu = CCMenu::create(m_pCloseVolice, NULL); pMenu->setPosition(CCPointZero); m_pCloseVolice->setVisible(false); this->addChild(pMenu, 1, 101); // 坐标信息 this->initCoordinate(); // 初始化时间 this->initTimeShow(); // 初始化图片 this->initListImage();  this->setTouchEnabled(true); this->schedule(schedule_selector(CCMainMenu::updateTime), 1.0f); // 这个相当于做一个双buffer，移动一个buffer，显示一个buffer for (int i = 0; i < 10; ++i) {  for (int j = 0; j < 9; ++j)  {   g_cur_map[i][j] = g_chess_map[i][j];  } } // 一些游戏中用到的状态变量，需要的时候我们再详细描述 m_enGameStatus  = GAME_MENU; m_enCurRole   = ROLE_RED; m_bVolice   = true; m_pCurChess   = NULL; m_bSelect   = false; m_bCollectCorrect = true; m_pTargetChess  = NULL; m_nContinuous  = 3; m_nCur    = 0; m_enCurChessType = CHESS_NONE; m_enTarChessType    = CHESS_NONE; m_nWin    = -1; m_vecSprite.reserve(10);  return true;}

init函数执行完之后，程序就显示出主界面如下：