cocos2dx 宏：CC_PROPERTY

勤奋努力，持之以恒！

cocos2d-x定义了很多宏定义，有助于我们提高开发效率
而CC_PROPERTY 用来声明一个protected变量。
使用CC_PROPERTY声明的变量可以使用getter获取变量的值，使用setter设置变量的值。

CC_PROPERTY的声明在CCPlatformMacros.h中，结构如下

/** CC_PROPERTY is used to declare a protected variable.
 We can use getter to read the variable, and use the setter to change the variable.
 @param varType : the type of variable.     变量类型
 @param varName : variable name.            变量名称
 @param funName : "get + funName" is the name of the getter.
 "set + funName" is the name of the setter.
 @warning : The getter and setter are public virtual functions, you should rewrite them first.
 The variables and methods declared after CC_PROPERTY are all public.
 If you need protected or private, please declare.
 */
#define CC_PROPERTY(varType, varName, funName)\
protected: varType varName;\
public: virtual varType get##funName(void);\
public: virtual void set##funName(varType var);

CC_PROPERTY使用方法：

.h

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"
USING_NS_CC;
using namespace std;

class HelloWorld : public CCLayer
{
public:
    virtual bool init();
    static CCScene* scene();
    CREATE_FUNC(HelloWorld);
    
    CC_PROPERTY(unsigned int, _heroID, HeroID);
    CC_PROPERTY(string, _heroName, HeroName);
};

#endif // __HELLOWORLD_SCENE_H__

.cpp

#include "HelloWorldScene.h"
#include "SimpleAudioEngine.h"

using namespace cocos2d;
using namespace CocosDenshion;

CCScene* HelloWorld::scene()
{
    CCScene *scene = CCScene::create();
    HelloWorld *layer = HelloWorld::create();
    scene->addChild(layer);
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    if ( !CCLayer::init() )
    {
        return false;
    }

    
    this->setHeroID(110120);
    this->setHeroName("police doctor");
    
    CCLog("HeroID == %d, HeroName == %s",this->getHeroID(),this->getHeroName().c_str());
    
    return true;
}

//CC_PROPERTY(unsigned int, _heroID, HeroID);
void HelloWorld::setHeroID(unsigned int var)
{
    _heroID = var;
}
unsigned int HelloWorld::getHeroID()
{
    return _heroID;
}


//CC_PROPERTY(string, _heroName, HeroName);
void HelloWorld::setHeroName(string var)
{
    _heroName = var;
}
string HelloWorld::getHeroName()
{
    return _heroName;
}