//粒子系统，使用系统自己的粒子系统的书写方法    if(!CCLayer::init()) return false;    CCTexture2D* fire=CCTextureCache::sharedTextureCache()->addImage("fire.png");    CCParticleSystem* firePartical = CCParticleFire::create();    firePartical->setTexture(fire);    this->addChild(firePartical);    firePartical->setPosition(ccp(100,100));        //自定义粒子系统的使用方法，需要plist文件，plist通过对应的编辑器获取    if(!CCLayer::init()) return false;    ParticleSystemQuad* system = ParticleSystemQuad::create("BoilingFoam.plist");    system->setTextureWithRect(Director::getInstance()->getTextureCache()->addImage("fire.png"), Rect(0, 0, 64, 64));    this->addChild(system);    system->setPosition(300,300);    system->retain();        //精灵使用方法，下面为设置100个精灵随机加载到420*420的位置    for (int i = 0; i < 100; i++)    {        CCSprite* pSprite = CCSprite::create("tp_4.png");        CC_BREAK_IF(!pSprite);        pSprite->setPosition(ccp(CCRANDOM_0_1()*420,CCRANDOM_0_1()*420));        this->addChild(pSprite);    }        //精灵纹理集使用方法    CCSpriteBatchNode* ccSprite = CCSpriteBatchNode::create("tp_4.png");    if (!ccSprite) return false;    this->addChild(ccSprite);    for (int i = 0; i < 100; i++)    {        CCSprite* ccsprite2 = CCSprite::createWithTexture(ccSprite->getTexture());        ccsprite2->setPosition(ccp(CCRANDOM_0_1() * 600, CCRANDOM_0_1() * 600));        ccSprite->addChild(ccsprite2);    }        //显示helloworld     //    //   Size visibleSize = Director::getInstance()->getVisibleSize(); //   Vec2 origin = Director::getInstance()->getVisibleOrigin();    // //   / //   // 2. add a menu item with "X" image, which is clicked to quit the program //   //    you may modify it. //   // add a "close" icon to exit the progress. it's an autorelease object //   auto closeItem = MenuItemImage::create( //                                          "CloseNormal.png", //                                          "CloseSelected.png", //                                          CC_CALLBACK_1(HelloWorld::menuCloseCallback, this)); //       //closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2 , //                               origin.y + closeItem->getContentSize().height/2)); //   // create menu, it's an autorelease object //   auto menu = Menu::create(closeItem, NULL); //   menu->setPosition(Vec2::ZERO); //   this->addChild(menu, 1); //   / //   // 3. add your codes below... //   // add a label shows "Hello World" //   // create and initialize a label //   auto label = Label::createWithTTF("my app ", "fonts/Marker Felt.ttf", 24); //    //   // position the label on the center of the screen //   label->setPosition(Vec2(origin.x + visibleSize.width/2, //                           origin.y + visibleSize.height - label->getContentSize().height)); //   // add the label as a child to this layer //   this->addChild(label, 1); //   // add "HelloWorld" splash screen" //   auto sprite = Sprite::create("HelloWorld.png"); //   // position the sprite on the center of the screen //   sprite->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y)); //   // add the sprite as a child to this layer //   this->addChild(sprite, 0); //    //   return true;