前两天搭好了windows+VS2010+cocos2d-x 和MacMini+xcode+cocos2d-x两个开发环境。两个开发环境下的HelloWorld测试程序和自己添加的HelloWorld测试程序、

通过编译并顺利运行，具体的配置办法来自网络资料介绍，感谢强大的网路。万里长征第一步，在此Mark一下。

具体环境搭建方法网络上有许多的介绍，在此就不做复述。下面就自己对HelloWorld做具体分析。

因为Win32下和iOS下HelloWorld的结构十分相似，就那iOS下HelloWorld做举例分析。

首先程序启动进入程序入口函数，在main.m文件下

int main(int argc, char *argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePoolalloc] init];

int retVal = UIApplicationMain(argc, argv, nil, @"AppController");

[pool release];

return retVal;

}

然后进入

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions函数。在该函数中创建窗口，并调

cocos2d::CCApplication::sharedApplication()->run();该函数调用

bool AppDelegate::applicationDidFinishLaunching()函数

bool AppDelegate::applicationDidFinishLaunching()

{

// initialize director

CCDirector *pDirector = CCDirector::sharedDirector();／／创建出导演类对象

pDirector->setOpenGLView(CCEGLView::sharedOpenGLView());

// turn on display FPS

pDirector->setDisplayStats(true);

// set FPS. the default value is 1.0/60 if you don't call this

pDirector->setAnimationInterval(1.0 / 60);／／刷新屏幕的频率。实际上它影响到你的游戏所能达到的最大帧速率

// create a scene. it's an autorelease object

CCScene *pScene = HelloWorld::scene();／／HelloWorld的scene方法实际上是创建了一个CCScene 对象(autorelease,关于autorelease属性，个人理解为类似于C++中智能指针，采用引用计数的方法管理内存)

// run

pDirector->runWithScene(pScene);

returntrue;

}

下面就HelloWorld类做点分析

在HelloWorld.h文件中有个宏定义很关键

CREATE_FUNC(HelloWorld);

它的具体代码为

#define CREATE_FUNC(__TYPE__) \

static __TYPE__* create() \

{ \

__TYPE__ *pRet = new __TYPE__(); \

if (pRet && pRet->init()) \

{ \

pRet->autorelease(); \

return pRet; \

} \

else \

{ \

delete pRet; \

pRet = NULL; \

return NULL; \

} \

}

实际上这个宏定义中会调用HelloWorld中的init方法。

CCScene* HelloWorld::scene()

{

// 'scene' is an autorelease object

CCScene *scene = CCScene::create();／／关键代码，创建CCScene对象

// 'layer' is an autorelease object

HelloWorld *layer = HelloWorld::create();

// add layer as a child to scene

scene->addChild(layer);／／在scene上添加layer.

// return the scene

return scene;

}

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

boolHelloWorld::init()//layer上添加的具体精灵的实现

{

//

// 1. super init first

if ( !CCLayer::init() )

{

returnfalse;

}

/

// 2. add a menu item with "X" image, which is clicked to quit the program

//    you may modify it.

// add a "close" icon to exit the progress. it's an autorelease object

CCMenuItemImage *pCloseItem = CCMenuItemImage::create(

"CloseNormal.png",

"CloseSelected.png",

this,

menu_selector(HelloWorld::menuCloseCallback) );

pCloseItem->setPosition( ccp(CCDirector::sharedDirector()->getWinSize().width/2 , CCDirector::sharedDirector()->getWinSize().width/2) );

/

// 3. add your codes below..

// add a label shows "Hello World"

// create and initialize a label

CCLabelTTF* pLabel = CCLabelTTF::create("Box of chen", "Thonburi", 34);

// ask director the window size

// position the label on the center of the screen

pLabel->setPosition( ccp(CPercent::GetPercent(size.width, 50), CPercent::GetPercent(size.height, 90)) );

// add the label as a child to this layer

this->addChild(pLabel, 1);

// add "HelloWorld" splash screen"

CCSprite* pSprite = CCSprite::create("bgimg.jpg");

// position the sprite on the center of the screen

pSprite->setPosition( ccp(size.width/2, size.height/2) );

// add the sprite as a child to this layer

this->addChild(pSprite, 0);

returntrue;

}

void HelloWorld::menuCloseCallback(CCObject* pSender)

{

CCDirector::sharedDirector()->end();

#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)

exit(0);

#endif

}