cocos2d-x学习笔记(5)-- CCScene场景的切换

cocos2d-x学习笔记(5)-- CCScene场景的切换本文出自http://www.wenbanana.com稻草人博客，欢迎访问！step1：创建一个cocos2d-win32 application，并命名为simpleGame;step:为了代码的整洁，我把上一节中的山和太阳这两个背景合为一个背景---LayerDay(白天)，同时将山和月亮合并为NightLayer夜景(晚上)效果如下两张图白天：晚上：在HelloWorldScene.h中添加LayerDay 、LayerNight和MyScene三个类：

/************************************************************************//* 白天的背景                                                                     *//************************************************************************/class LayerDay:public CCLayerColor{public:LayerDay();~LayerDay();public:virtual void onEnter();};/************************************************************************//* 晚上的背景                                                                     *//************************************************************************/class LayerNight:public CCLayerColor{public:LayerNight();~LayerNight();public:virtual void onEnter();};/************************************************************************//* 自定义场景                                                               *//************************************************************************/class MyScene:public CCScene{public:MyScene();public:virtual void onEnter();virtual void runThisTest();void daySceneCallback(CCObject* pSender);void nightSceneCallback(CCObject* pSender);};

在HelloWorldScene.cpp中修改HelloWorld::scene()如下：

CCScene* HelloWorld::scene(){CCScene * scene = NULL;do{// 'scene' is an autorelease objectscene = new MyScene();CC_BREAK_IF(! scene);// 'layer' is an autorelease object//HelloWorld *layer = HelloWorld::node();LayerDay* pLayer = new LayerDay();// add layer as a child to scene//addChild中的第二个参数为背景的次序，LayerHill在LayerCloud的上面，即表面。scene->addChild(pLayer,0);} while (0);// return the scenereturn scene;}

然后添加三个类的成员函数：

/************************************************************************//* class LayerNight                                                                   *//************************************************************************/LayerNight::LayerNight(){CCSize size = CCDirector::sharedDirector()->getWinSize();this->initWithColor(ccc4(0,0,0,255));CCSprite* pSpriteNight =  CCSprite::spriteWithFile("night.png");CCSprite* pSpriteHill = CCSprite::spriteWithFile("hill.png");pSpriteNight->setPosition(ccp(size.width/2,size.height/2));pSpriteHill->setPosition(ccp(size.width/2,size.height/2));addChild(pSpriteNight);addChild(pSpriteHill);}LayerNight::~LayerNight(){}void LayerNight::onEnter(){CCLayer::onEnter();}/************************************************************************//* class LayerDay                                                                    *//************************************************************************/LayerDay::LayerDay (){this->initWithColor(ccc4(255,255,255,255));CCSize size = CCDirector::sharedDirector()->getWinSize();CCSprite* pSpriteHill = CCSprite::spriteWithFile("hill.png");CCSprite* pSpriteCloud = CCSprite::spriteWithFile("cloud.png");pSpriteCloud->setPosition(ccp(size.width/2,size.height/2));pSpriteHill->setPosition(ccp(size.width/2,size.height/2));addChild(pSpriteCloud);addChild(pSpriteHill);}LayerDay ::~LayerDay (){}void LayerDay ::onEnter(){CCLayer::onEnter();}/************************************************************************//* 自定义场景                                                               *//************************************************************************/MyScene::MyScene(){CCScene::init();CCLabelTTF* labelDay = CCLabelTTF::labelWithString("Day", "Arial",20);CCLabelTTF* labelNight = CCLabelTTF::labelWithString("Night", "Arial",20);CCMenuItemLabel* pMenuDayItem = CCMenuItemLabel::itemWithLabel(labelDay, this,menu_selector(MyScene::daySceneCallback));CCMenuItemLabel* pMenuNightItem = CCMenuItemLabel::itemWithLabel(labelNight, this,menu_selector(MyScene::nightSceneCallback));CCMenu* pMenuDay = CCMenu::menuWithItems(pMenuDayItem, NULL);CCMenu* pMenuNight = CCMenu::menuWithItems(pMenuNightItem, NULL);CCSize size = CCDirector::sharedDirector()->getWinSize();pMenuDayItem->setPosition(ccp(size.width/2 - 40, 30));pMenuNightItem->setPosition(ccp(size.width/2 + 40, 30));pMenuDay->setPosition(CCPointZero);pMenuNight->setPosition(CCPointZero);addChild(pMenuDay,2);addChild(pMenuNight,2);}void MyScene::daySceneCallback(CCObject *pSender){CCScene* scene =new MyScene();CCLayer* pLayer = new LayerDay();scene->addChild(pLayer, 0);CCDirector::sharedDirector()->pushScene(scene);scene->release();pLayer->release();}void MyScene::nightSceneCallback(CCObject* pSender){CCScene* scene =new MyScene();CCLayer* pLayer = new LayerNight();scene->addChild(pLayer, 0);CCDirector::sharedDirector()->pushScene(scene);scene->release();pLayer->release();}void MyScene::onEnter(){CCScene::onEnter();}void MyScene::runThisTest(){CCLayer* pLayer = new LayerNight();addChild(pLayer);pLayer->release();CCDirector::sharedDirector()->replaceScene(this);}

step3:编译运行程序，就会出现如下画面，通过点击画面上的 "Day"和"Night"两个字样，就可以对场景进行切换。但是，场景在切换时给人感觉很生硬，要想让场景间过度得更更自然、更绚丽，我们在HelloWorldScene.cpp中对代码做一些修改：首先添加CCTransitionScene* createTransition(cocos2d::ccTime t, CCScene* s){return CCTransitionFadeUp::transitionWithDuration(t, s);//此处是场景切换时的效果//return CCTransitionFadeDown::transitionWithDuration(t, s);//return CCTransitionTurnOffTiles::transitionWithDuration(t, s);//return CCTransitionSplitRows::transitionWithDuration(t, s);//return CCTransitionSplitCols::transitionWithDuration(t, s);//......}再次运行程序，这次效果是不是好多了呢！源代码下载地址：http://download.csdn.net/download/wen294299195/4525796