大家都知道一个程序中只有一个导演类，eg:

CCDirector *pDirectory = CCDirector::sharedDirector();//初始化导演类。

可通过 pDirectory->属性 取得自己想要的值。

我们也可以自己设定一个类用于存储只初始化一次的量，刚开始学2dx，今天为了2个CCLayer之间传值而使用单例，设定A界面的几个参数值，当A场景切换跳转到B界面时，B需要用到A界面的这几个参数值，故单独写了个单例类用于存储数据参数。

.h:

#ifndef __ResultCar__GameData__

#define __ResultCar__GameData__

#include

#include "cocos2d.h"

class GameData : public cocos2d::CCObject {

public:

static GameData\* sharedGameData();

CC\_PROPERTY(float, myEngine, MyEngine);

CC\_PROPERTY(float, myG, MyG);

CC\_PROPERTY(float, myFrition, MyFrition);

};

.m:

#include "GameData.h"

GameData *gameData = NULL;

GameData* GameData::sharedGameData()

{

if(!gameData)

    gameData = new GameData();

return gameData;

}

float GameData::getMyEngine()

{

return myEngine;

}

void GameData::setMyEngine(float engine)

{

myEngine = engine;

}

float GameData::getMyG()

{

return myG;

}

void GameData::setMyG(float g)

{

myG = g;

}

float GameData::getMyFrition()

{

return myFrition;

}

void GameData::setMyFrition(float frition)

{

myFrition = frition;

}

当我存储数据的时候可通过以下代码存储:

GameData::sharedGameData()->setMyEngine(myEngine); // myEngine是A界面的参数

这里设定了3个参数分别存储:

GameData::sharedGameData()->setMyG(myI);

GameData::sharedGameData()->setMyFrition(myFriction);

当我在B界面用到这几个参数的时候可通过如下代码来获得:

//car_myEngine car_myI car_myFrition 为B界面用于接收数据的属性值

　 car_myEngine = GameData::sharedGameData()->getMyEngine();

car\_myI = GameData::sharedGameData()->getMyG();

car\_myFrition = GameData::sharedGameData()->getMyFrition();