cocos2d-x——在一个cpp中展示多个场景-优快云博客

本文介绍了一个使用 Cocos2d-x 实现的游戏场景切换示例，包括如何通过不同的回调函数实现场景的前进、后退及重启等功能，并展示了具体的代码实现。

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//20秒后自动运行下一个场景

runAction( CCSequence::create(CCDelayTime::create(20.0f),
			CCCallFunc::create(this, callfunc_selector(GameOver::removeThis)),NULL));
void GameOver::removeThis()
{
	nextCallback(this);
}

.h文件

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

#include "Box2D/Box2D.h"

#include "SimpleAudioEngine.h"

class HelloWorld : public cocos2d::CCLayer
{
public:
    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
    virtual bool init();  
    // there's no 'id' in cpp, so we recommand to return the exactly class pointer
    static cocos2d::CCScene* scene();

    void menuCloseCallback(CCObject* pSender);
	void restartCallback(CCObject* pSender);
	void nextCallback(CCObject* pSender);
	void backCallback(CCObject* pSender);
	void Test();
    CREATE_FUNC(HelloWorld);
};
class Test1 : public HelloWorld
{
public:
	Test1();
};
class Test2 : public HelloWorld
{
public:
	Test2();
};
class Test3 : public HelloWorld
{
public:
	Test3();
};
#endif  // __HELLOWORLD_SCENE_H__

.cpp文件

#include "HelloWorldScene.h"

using namespace cocos2d;

CCLayer* nextSpriteTestAction();
CCLayer* backSpriteTestAction();
CCLayer* restartSpriteTestAction();
static int sceneIdx = -1; 
typedef CCLayer* (*NEWDRAWPRIMITIVESFUNC)();
#define DRAWPRIMITIVES_CREATE_FUNC(className) \
	static CCLayer* create##className() \
{ return new className(); }

DRAWPRIMITIVES_CREATE_FUNC(Test1);
DRAWPRIMITIVES_CREATE_FUNC(Test2);
DRAWPRIMITIVES_CREATE_FUNC(Test3);
static NEWDRAWPRIMITIVESFUNC createFunctions[] =
{
	createTest1,
	createTest2,
	createTest3,
};
#define MAX_LAYER  (sizeof(createFunctions) / sizeof(createFunctions[0]))
static CCLayer* nextAction()
{
	sceneIdx++;
	sceneIdx = sceneIdx % MAX_LAYER;
	CCLayer* pLayer = (createFunctions[sceneIdx])();
	pLayer->autorelease();
	return pLayer;
}
static CCLayer* backAction()
{
	sceneIdx--;
	int total = MAX_LAYER;
	if( sceneIdx < 0 )
		sceneIdx += total;
	CCLayer* pLayer = (createFunctions[sceneIdx])();
	pLayer->autorelease();
	return pLayer;
}
static CCLayer* restartAction()
{
		CCLayer* pLayer = (createFunctions[sceneIdx])();
		pLayer->autorelease();
		return pLayer;
}
void HelloWorld::restartCallback(cocos2d::CCObject *pSender)
{
	if (sceneIdx != -1)
	{
		CCScene *s = new CCScene;
		s->addChild(restartAction());
		CCDirector::sharedDirector()->replaceScene(s);
		s->release();
	}
}
void HelloWorld::nextCallback(cocos2d::CCObject *pSender)
{
	CCScene *s = new CCScene;
	s->addChild(nextAction());
	CCDirector::sharedDirector()->replaceScene(s);
	s->release();
}
void HelloWorld::backCallback(cocos2d::CCObject *pSender)
{
	CCScene *s = new CCScene;
	s->addChild(backAction());
	CCDirector::sharedDirector()->replaceScene(s);
	s->release();
}
void HelloWorld::menuCloseCallback(CCObject* pSender)
{
	CCDirector::sharedDirector()->end();
}
CCScene* HelloWorld::scene()
{
    CCScene * scene = NULL;
    do 
    {
        // 'scene' is an autorelease object
        scene = CCScene::create();
        CC_BREAK_IF(! scene);

        // 'layer' is an autorelease object
        HelloWorld *layer = HelloWorld::create();
        CC_BREAK_IF(! layer);

        // add layer as a child to scene
        scene->addChild(layer);
    } while (0);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    bool bRet = false;
    do 
    {
        CC_BREAK_IF(! CCLayer::init());

		CCSize s = CCDirector::sharedDirector()->getWinSize();
		CCLabelTTF* l = CCLabelTTF::create("Test3333333", "Thonburi", 16);
		addChild(l);
		l->setPosition( ccp(s.width/2,s.height/2-100));
		Test();

        bRet = true;
    } while (0);

    return bRet;
}
void HelloWorld::Test()
{
	CCSize s = CCDirector::sharedDirector()->getWinSize();
	CCMenuItemImage *item1 = CCMenuItemImage::create("b1.png", "b2.png", this, menu_selector(HelloWorld::backCallback));
	CCMenuItemImage *item2 = CCMenuItemImage::create("r1.png", "r2.png", this, menu_selector(HelloWorld::restartCallback));
	CCMenuItemImage *item3 = CCMenuItemImage::create("f1.png", "f2.png", this, menu_selector(HelloWorld::nextCallback));
	CCMenuItemImage *pCloseItem = CCMenuItemImage::create("CloseNormal.png","CloseSelected.png",this,menu_selector(HelloWorld::menuCloseCallback));
	CCMenu *menu = CCMenu::create(item1, item2, item3,pCloseItem, NULL);
	menu->setPosition(CCPointZero);
	item1->setPosition(ccp(s.width/2 - item2->getContentSize().width*2, item2->getContentSize().height/2));
	item2->setPosition(ccp(s.width/2, item2->getContentSize().height/2));
	item3->setPosition(ccp(s.width/2 + item2->getContentSize().width*2, item2->getContentSize().height/2));
	pCloseItem->setPosition(ccp(s.width - 20, s.height-20));
	addChild(menu, 100);
}
Test1::Test1()
{
	Test();
	CCSize s = CCDirector::sharedDirector()->getWinSize();
	CCLabelTTF* l = CCLabelTTF::create("Test1", "Thonburi", 16);
	addChild(l);
	l->setPosition( ccp(s.width/2,s.height/2));
}
Test2::Test2()
{
	Test();
	CCSize s = CCDirector::sharedDirector()->getWinSize();
	CCLabelTTF* l = CCLabelTTF::create("Test2", "Thonburi", 16);
	addChild(l);
	l->setPosition( ccp(s.width/2,s.height/2));
}
Test3::Test3()
{
	Test();
	CCSize s = CCDirector::sharedDirector()->getWinSize();
	CCLabelTTF* l = CCLabelTTF::create("Test3", "Thonburi", 16);
	addChild(l);
	l->setPosition( ccp(s.width/2,s.height/2));
}