编码

用cocos2dx默认的方式存放数据是不安全的，通常要经过base64编码

新建工程，testCode

修改HelloWorldScene.h

#ifndef __HELLOWORLD_SCENE_H__

#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

class HelloWorld : public cocos2d::CCLayer

{

public:

    // Method 'init' in cocos2d-x returns bool, instead of 'id' in cocos2d-iphone (an object pointer)

    virtual bool init();

    // there's no 'id' in cpp, so we recommend to return the class instance pointer

    static cocos2d::CCScene* scene();    

   

    // preprocessor macro for "static create()" constructor ( node() deprecated )

    CREATE_FUNC(HelloWorld);

};

#endif // __HELLOWORLD_SCENE_H__

修改HelloWorldScene.cpp

#include "HelloWorldScene.h"

#include "SimpleAudioEngine.h"

#include "BaseData.h"

using namespace cocos2d;

using namespace CocosDenshion;

using namespace std;

CCScene* HelloWorld::scene()

{

    // 'scene' is an autorelease object

    CCScene *scene = CCScene::create();

    

    // 'layer' is an autorelease object

    HelloWorld *layer = HelloWorld::create();

    // add layer as a child to scene

    scene->addChild(layer);

    // return the scene

    return scene;

}

// on "init" you need to initialize your instance

bool HelloWorld::init()

{

    //////////////////////////////

    // 1. super init first

    if ( !CCLayer::init() )

    {

        return false;

    }

    //需要存储的字符串

    string sValue="Himi";

    //将对存储的数据进行编码

    string saveBaseString = saveData(sValue.c_str(),sValue.length());

    //将得到编码后的数据进行存储

    CCUserDefault::sharedUserDefault()->setStringForKey("Base", saveBaseString);

    CCUserDefault::sharedUserDefault()->flush();

    

    //从存储中获取编码的数据

    string loadBaseString = CCUserDefault::sharedUserDefault()->getStringForKey("Base");

    //对编码数据进行解码得到真实数据

    string trueValue=parseData(loadBaseString);

    

    //---------用以观察数据

    CCLabelTTF *label=CCLabelTTF::create("","Helvetica",20);

    label->setPosition(ccp(240,185));

    addChild(label);

    string logStr="编码前的数据";

    logStr+=sValue;

    logStr+=" 编码后的数据:";

    logStr+=saveBaseString;

    label->setString(logStr.c_str());

    

    CCLabelTTF *label2=CCLabelTTF::create("","Helvetica",20);

    label2->setPosition(ccp(240,140));

    addChild(label2);

    logStr="解码前的数据";

    logStr+=loadBaseString;

    logStr+=" 解码后的数据:";

    logStr+=trueValue;

    label2->setString(logStr.c_str());

    

        

    return true;

}