4.cocos场景和层的调用

调用关系:

• AppDeligate.cpp

   bool AppDelegate::applicationDidFinishLaunching() {
       // initialize director
       auto director = Director::getInstance();
       auto glview = director->getOpenGLView();
       if(!glview) {
           glview = GLViewImpl::createWithRect("MyLayer", Rect(, , , ));
           director->setOpenGLView(glview);
       }
  
       director->getOpenGLView()->setDesignResolutionSize(, , ResolutionPolicy::SHOW_ALL);
  
       // turn on display FPS
       director->setDisplayStats(true);
  
       // set FPS. the default value is 1.0/60 if you don't call this
       director->setAnimationInterval(1.0 / );
  
       FileUtils::getInstance()->addSearchPath("res");
  
       // create a scene. it's an autorelease object
       //auto scene = HelloWorld::createScene();
  
       CCScene *pScene = MyScene::create();
  
       // run
       director->runWithScene(pScene);
  
       return true;
   }

• MyScene.h

   #include "cocos2d.h"
   USING_NS_CC;
  
   class MyScene:public CCScene
   {
   public:
       static MyScene *create();
       bool init();
  
   };

• MyScene.cpp

   #include "MyScene.h"
   #include "MyLayer.h"
  
   MyScene *MyScene::create()
   {
       MyScene *pRet = new MyScene;
       if (pRet && pRet->init())
       {
           pRet->autorelease();
       }
       else
       {
           delete pRet;
           pRet = NULL;
       }
       return pRet;
    }
   bool MyScene::init()
   {
       CCScene::init();
       MyLayer *layer = MyLayer::create();
       this->addChild(layer);
       return true;
   }

• MyLayer.h

  #include "cocos2d.h"
  USING_NS_CC;
  
  class MyLayer : public CCLayer
  {
  public:
  	static MyLayer *create();
  	bool init();
  };
  

  　　

• MyLayer.cpp

  #include "MyLayer.h"
  
  MyLayer *MyLayer::create()
  {
  	MyLayer *pRet = new MyLayer();
  	if (pRet && pRet->init())
  	{
  		pRet->autorelease();
  	}
  	else
  	{
  		delete pRet;
  		pRet = NULL;
  	}
  	return pRet;
   }
  
   bool MyLayer::init()
   {
  	 if (!CCLayer::init())
  	 {
  		 return false;
  	 }
  	 CCSize winSize = CCDirector::sharedDirector()->getWinSize();
  	 CCSprite *spr = CCSprite::create("shop.jpg");
  	 spr->setPosition(ccp(winSize.width / 4, winSize.height / 2));
  	 addChild(spr);
  	 return true;
  }