废话不说  直接看注释

<span style="font-size:24px;color:#ff0000;">AppDelegate.cpp</span>

#include "AppDelegate.h"
#include "HelloWorldScene.h"

//USING_NS_CC == using namespace cocos2d
USING_NS_CC;//using namespace cocos2d



//构造函数
AppDelegate::AppDelegate() {

}
//析构函数
AppDelegate::~AppDelegate() 
{
}

//程序初始化函数
bool AppDelegate::applicationDidFinishLaunching() {
    // initialize director
	//获取设备
    auto director = Director::getInstance();
	//取得OpenGL窗口
    auto glview = director->getOpenGLView();
    if(!glview) {
		//如果为空，则创建以" www.sundaboke.com"为窗口标题的窗口。  
        glview = GLView::create("www.sundaboke.com");//这里我修改过 //刚刚开始是My Game 我修改成www.sundaboke.com  cocos2dx 默认的设置的窗口大小是960,640
		//设置设备使用的窗口，此句可以去掉。  
		//director->setOpenGLView(glview);这一句我个人医保写在下面
    }
	//设置设备使用的窗口，
	director->setOpenGLView(glview);
	

    // turn on display FPS
	//打开FPS显示
    director->setDisplayStats(true);

    // set FPS. the default value is 1.0/60 if you don't call this
	//设置每秒60帧
    director->setAnimationInterval(1.0 / 60);

    // create a scene. it's an autorelease object
	//创建HelloWorld场景
    auto scene = HelloWorld::createScene();

    // run
	//运行场景
    director->runWithScene(scene);

    return true;
}

// This function will be called when the app is inactive. When comes a phone call,it's be invoked too
//当收到电话时，游戏转入后台服务，响应这句话
void AppDelegate::applicationDidEnterBackground() {
    Director::getInstance()->stopAnimation();

	//如果使用使用，下面可以用这句代码暂停
    // if you use SimpleAudioEngine, it must be pause
    // SimpleAudioEngine::getInstance()->pauseBackgroundMusic();
}

// this function will be called when the app is active again
//当电话完成，选择恢复游戏是，响应这一句
void AppDelegate::applicationWillEnterForeground() {
    Director::getInstance()->startAnimation();

    // if you use SimpleAudioEngine, it must resume here
	//如果使用声音，下面可以用这句代码恢复
    // SimpleAudioEngine::getInstance()->resumeBackgroundMusic();
}

<span style="font-size:48px;color:#ff0000;"></span><pre name="code" class="cpp"><span style="font-size:48px;color:#ff6666;">HelloWorldScene.h</span>

<pre name="code" class="cpp">#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

class HelloWorld : public cocos2d::Layer
{
public:
    // there's no 'id' in cpp, so we recommend returning the class instance pointer
	//静态函数创建createScene    cocos2dx3.x以后都是这个
    static cocos2d::Scene* createScene();

    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
	//初始化
    virtual bool init();  
    
    // a selector callback
	//响应按钮退出程序
    void menuCloseCallback(cocos2d::Ref* pSender);
    
    // implement the "static create()" method manually
	// 增加一个静态的create函数来创建实例。 
    CREATE_FUNC(HelloWorld);
};

#endif // __HELLOWORLD_SCENE_H__

#include "HelloWorldScene.h"USING_NS_CC;//使用cocos2dx命名空间 USING_NS_CC == using namespace cocos2d//静态函数创建场景Scene* HelloWorld::createScene(){    // 'scene' is an autorelease object<span style="white-space:pre">	</span>//创建一个Scene     auto scene = Scene::create();        // 'layer' is an autorelease object<span style="white-space:pre">	</span>//创建一个 layer    auto layer = HelloWorld::create();    // add layer as a child to scene<span style="white-space:pre">	</span>// 把 layer 发到 scene 中    scene->addChild(layer);    // return the scene    return scene;}// on "init" you need to initialize your instancebool HelloWorld::init(){    //////////////////////////////    // 1. super init first<span style="white-space:pre">	</span>//先初始化    if ( !Layer::init() )    {        return false;    }    //获取屏幕分辨率    Size visibleSize = Director::getInstance()->getVisibleSize();<span style="white-space:pre">	</span><span style="white-space:pre">	</span>//获取圆点坐标    Vec2 origin = Director::getInstance()->getVisibleOrigin();    /////////////////////////////    // 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<span style="white-space:pre">	</span>//创建一个按钮，用2张图表示，默认是第一张图片，按下使用第二张，按下的时候调用HelloWorld::menuCloseCallback方法    auto closeItem = MenuItemImage::create(                                           "CloseNormal.png",                                           "CloseSelected.png",                                           CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));    //设置按钮的位置<span style="white-space:pre">	</span>closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,                                origin.y + closeItem->getContentSize().height/2));    // create menu, it's an autorelease object<span style="white-space:pre">	</span>//由菜单项创建按钮.      auto menu = Menu::create(closeItem, NULL);    menu->setPosition(Vec2::ZERO);//设置菜单的位置    this->addChild(menu, 1);    /////////////////////////////    // 3. add your codes below...    // add a label shows "Hello World"    // create and initialize a label    //创建一个文本标签，    auto label = LabelTTF::create("www.sundaboke.com", "Arial", 24);        // position the label on the center of the screen<span style="white-space:pre">	</span>//设置文本标签的位置    label->setPosition(Vec2(origin.x + visibleSize.width/2,                            origin.y + visibleSize.height - label->getContentSize().height));    // add the label as a child to this layer    this->addChild(label, 1);//在屏幕上面显示标签    // add "HelloWorld" splash screen"<span style="white-space:pre">	</span>//创建一个背景    auto sprite = Sprite::create("HelloWorld.png");    // position the sprite on the center of the screen<span style="white-space:pre">	</span>//设置背景的位置    sprite->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));    // add the sprite as a child to this layer<span style="white-space:pre">	</span>//把背景添加到屏幕中    this->addChild(sprite, 0);        return true;}//响应按钮按下时的事件处理  void HelloWorld::menuCloseCallback(Ref* pSender){<span style="white-space:pre">	</span>//如果是WP8平台，弹出消息框提示一下。 #if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)<span style="white-space:pre">	</span>MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");    return;#endif<span style="white-space:pre">	</span>//否则，终止程序。     Director::getInstance()->end();<span style="white-space:pre">	</span>//退出程序#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)    exit(0);#endif}

cocos2dx3.2helloword分析