1: CREATE_FUNC(HelloWorld);

 2: ////上面的宏替换后为以下内容

 3: static helloworld* create()

 4: {//调用构造函数，创建一个helloworld对象

 5:     helloworld *pret = new helloworld();

 6:     if (pret && pret->init())

 7:     {    //上面调用了init函数，如果对象创建成功且init成功

 8:         pret->autorelease();    //自动释放对象

 9:         return pret;

 10:     }

 11:     else

 12:     {    //delete并非无意义，在init失败的时候释放，短路操作pret!=NULL

 13:         delete pret;

 14:         pret = null;

 15:         return null;

 16:     }

 17: }

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

 2: bool HelloWorld::init()

 3: {

 4:     //////////////////////////////

 5:     // 1. super init first

 6:     //首先进行超类(被继承的类,就是基类。不建议用超类这个词，有歧义)的初始化

 7:     if ( !CCLayer::init() )

 8:     {    //对基类的是init不成功，返回false给调用者(create函数)

 9:         return false;

 11:

 12:     CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();

 13:     CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();

 14:

 15:     /////////////////////////////

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

 17:     //再加上“X”图像菜单项，并点击它来退出程序

 18:     // you may modify it.

 19:     // 你可以修改它。

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

 21:     // 添加一个“close”图标用于退出进程 。这是一个自动释放对象

 22:     CCMenuItemImage *pCloseItem = CCMenuItemImage::create(

 23:                                         "CloseNormal.png",

 24:                                         "CloseSelected.png",monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: white"> 25:                                         this,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: #f4f4f4"> 26:                                         menu_selector(HelloWorld::menuCloseCallback));

 27:

@H_491_301@ 28:     pCloseItem->setPosition(ccp(origin.x + visibleSize.width - pCloseItem->getContentSize().width/2,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: white"> 29:                                 origin.y + pCloseItem->getContentSize().height/2));

 30:

 31:     // create menu,it's an autorelease object

 32:     // 创建menu对象，也是自动释放的

 33:     CCMenu* pMenu = CCMenu::create(pCloseItem,NULL);

 34:     //设置位置为CCPintZero，其实就是原点ccp(0,0)

 35:     pMenu->setPosition(CCPointZero);

 36:     //添加到layer

 37:     this->addChild(pMenu,1);

 38:

 39:     /////////////////////////////

 40:     // 3. add your codes below...

 41:     // 添加你自己的代码到这下面

 42:     // add a label shows "Hello World"

 43:     // 添加一个label用来显示"Hello World"，可以修改为别的，中文支持不好。可以简单将源文件修改为UTF8格式来支持中文。

 44:     // create and initialize a label

 45:     // 创建一个label并初始化

 46:     CCLabelTTF* pLabel = CCLabelTTF::create("Hello World","Arial",24);

 47:

 48:     // position the label on the center of the screen

 49:     // 设置lable的位置在屏幕的中间(中央),其实是这个程序OpenGLView的中央

 50:     pLabel->setPosition(ccp(origin.x + visibleSize.width/2,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: white"> 51:                             origin.y + visibleSize.height - pLabel->getContentSize().height));

 52:

 53:     // add the label as a child to this layer

 54:     // 把创建的label作为一个孩子添加到这个layer层。(layer上放置Child)

 55:     this->addChild(pLabel,monospace; width: 100%; border-bottom-style: none; color: black; padding-bottom: 0px; direction: ltr; text-align: left; padding-top: 0px; border-right-style: none; padding-left: 0px; margin: 0em; border-left-style: none; line-height: 16pt; padding-right: 0px; background-color: #f4f4f4"> 56:

 57:     // add "HelloWorld" splash screen"

 58:     // 用HelloWorld.png来创建一个 Sprite(精灵)

 59:     CCSprite* pSprite = CCSprite::create("HelloWorld.png");

 60:

 61:     // position the sprite on the center of the screen

 62:     // 把上面刚刚创建的精灵的(放置的)位置为窗口的中央

 63:     pSprite->setPosition(ccp(visibleSize.width/2 + origin.x,visibleSize.height/2 + origin.y));

 64:

 65:     // add the sprite as a child to this layer

 66:     // 把上面创建的精灵sprite也添加到layer

 67:     this->addChild(pSprite,0);

 68:

 69:     return true;

 70: }

1: void HelloWorld::menuCloseCallback(CCObject* pSender)

 2: {

 3:     // 各个不同的平台标识

 4:     /*********************************************************

 5:  #define CC_PLATFORM_UNKNOWN 0

 6:  #define CC_PLATFORM_IOS 1

 7:  #define CC_PLATFORM_ANDROID 2

 8:  #define CC_PLATFORM_WIN32 3

 9:  #define CC_PLATFORM_MARMALADE 4

 10:  #define CC_PLATFORM_LINUX 5

 11:  #define CC_PLATFORM_BADA 6

 12:  #define CC_PLATFORM_BLACKBERRY 7

 13:  #define CC_PLATFORM_MAC 8

 14:  #define CC_PLATFORM_NACL 9

 15:  #define CC_PLATFORM_EMSCRIPTEN 10

 16:  #define CC_PLATFORM_TIZEN 11

 17:  #define CC_PLATFORM_WINRT 12

 18:  #define CC_PLATFORM_WP8 13

 19: 

 20:  #define CC_TARGET_PLATFORM CC_PLATFORM_WIN32

 21:  **********************************************************/

 22:     //进行平台的判断，这里是win32平台，其他的平台应该是不一样的

 23: #if (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT) || (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)

 24:     //WinRT和WindowsPhone8结束，其没有。。。

 25:     CCMessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");

 26: #else

 27:     CCDirector::sharedDirector()->end();    //导演end结束了

@H_491_301@ 28:     #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)

 29:         exit(0);    //IOS平台多做一步

 30:     #endif

 31: #endif

 32: }

1: CCScene* HelloWorld::scene()

 3:     // 'scene' is an autorelease object

 4:     // 场景也是自动释放对象的.看cocos2d3.0中间大量用到了C++11的特性，不想看了

 5:         // 这里创建一个scene场景，调用的是场景的创建方法

 6:     CCScene *scene = CCScene::create();

 7: // CCScene *CCScene::create()

 8: // {

 9: // CCScene *pRet = new CCScene();

 10: // if (pRet && pRet->init())

 11: // {

 12: // pRet->autorelease();

 13: // return pRet;

 14: // }

 15: // else

 16: // {

 17: // CC_SAFE_DELETE(pRet);

 18: // return NULL;

 19: // }

 20: // } 

 21:     // 'layer' is an autorelease object

 22:     // layer也是自动释放对象的

 23:     // 这个layer是HelloWorld的对象指针

 24:     HelloWorld *layer = HelloWorld::create();

 25:

 26:     // add layer as a child to scene

 27:     // 把layer添加到scene上去

@H_491_301@ 28:     scene->addChild(layer);

 29:

 30:     // return the scene

 31: return scene;

 32: //返回scene指针给调用者(AppDelegate::applicationDidFinishLaunching())

 33: }