[D_008] Layer - LogoLayer 예제

Scene과 무관하게 항상 그위치에 똑같이 존재하는 것(ex. 로고)은 각 Scene마다 매번 추가해주는 것은 비효율적이기 때문에, Layer로 따로 만들어서 사용하는것이 편하다.

LogoLayer 예제

LogoLayer.h

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#ifndef __LOGO_LAYER_H__     #define __LOGO_LAYER_H__   #include "cocos2d.h"     USING_NS_CC;   class LogoLayer : public Layer { public:       virtual bool init();     CREATE_FUNC(LogoLayer);     };   #endif // __LOGO_LAYER_H__

LogoLayer.cpp

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#include "LogoLayer.h"   USING_NS_CC;       bool LogoLayer::init() {     CCLOG("LogoLayer::init()");     if ( !Layer::init() )     {         return false;     }       return true; }

1) Scene에서 LogoLayer로 접근하기

layer 추가시에 setTag해준 다음, 이를 이용하여 자식의 객체에 접근 가능

2) LogoLayer에서 Scene으로 접근하기

getParent()함수를 통해 부모의 포인터에 접근. getParent()는 태그같은거 없다.

MenuScene.h

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#ifndef __MENU_SCENE_H__     #define __MENU_SCENE_H__   #include "cocos2d.h" #include "GameScene.h" #include "LogoLayer.h"   USING_NS_CC;   class MenuScene : public LayerColor { public:     static Scene* createScene();     virtual bool init();     CREATE_FUNC(MenuScene);       int menu;     void showMenu();            bool onTouchBegan(Touch* touch, Event* unused_event);   };   #endif // __MENU_SCENE_H__

MenuScene.cpp

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#include "MenuScene.h"   USING_NS_CC;   Scene* MenuScene::createScene() {     // 'scene' is an autorelease object     auto scene = Scene::create();     auto layer = MenuScene::create();     scene->addChild(layer);       return scene; }   bool MenuScene::init() {     CCLOG("MenuScene::init()");     if ( !LayerColor::initWithColor(Color4B::RED) )     {         return false;     }     menu = 0;     showMenu();       auto listener = EventListenerTouchOneByOne::create();     listener->onTouchBegan = CC_CALLBACK_2(MenuScene::onTouchBegan, this);     Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);       auto layer = LogoLayer::create();     layer->setTag(0);     this->addChild(layer);           return true; }   bool MenuScene::onTouchBegan(Touch* touch, Event* unused_event) { //    CCLOG("onTouchBegan");     auto scene = TransitionFadeTR::create( 1.0f, GameScene::createScene() );     Director::getInstance()->pushScene(scene);       auto layer = (LogoLayer*)this->getChildByTag(0);     auto spr = (Sprite*)layer->getChildByTag(2);     spr->setScale(2);       layer->score = 10;     layer->showScore();       return true; }   void MenuScene::showMenu() {     CCLOG("Menu = %d", menu); }

LogoLayer.h

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#ifndef __LOGO_LAYER_H__     #define __LOGO_LAYER_H__   #include "cocos2d.h" #include "MenuScene.h"   USING_NS_CC;   class LogoLayer : public Layer { public:       virtual bool init();     CREATE_FUNC(LogoLayer);       int score;     void showScore();   };   #endif // __LOGO_LAYER_H__

LogoLayer.cpp

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#include "LogoLayer.h"   USING_NS_CC;       bool LogoLayer::init() {     CCLOG("LogoLayer::init()");     if ( !Layer::init() )     {         return false;     }       auto spr1 = Sprite::create("Icon-57.png");     spr1->setAnchorPoint(Vec2::ZERO);     spr1->setPosition(Vec2(10, 10));     this->addChild(spr1);       auto spr2 = Sprite::create("Icon-57.png");     spr2->setTag(2);     spr2->setAnchorPoint(Vec2::ZERO);     spr2->setPosition(Vec2(10, 10));     this->addChild(spr2);       score = 0;         return true; }   void LogoLayer::showScore() {     CCLOG("SCORE : %d", score);       auto scene = (MenuScene*)this->getParent();     scene->menu = 100;     scene->showMenu();   }