Hello项目分析

 

main.cpp　　和所有项目一样  程序的主函数

1 // create the application instance

2     AppDelegate app;

3     CCEGLView& eglView = CCEGLView::sharedOpenGLView();

4     eglView.setViewName("Hello World");

5     eglView.setFrameSize(480, 320);

6     // set the design resolution screen size, if you want to use Design Resoulution scaled to current screen, please uncomment next line.

7     // eglView.setDesignResolutionSize(480, 320);

第三行意思是界面按照 OpenGL 的标准定义坐标

第四行设置界面的标题

第五行是设置尺寸

第七行我也不知道

AppDeletag.cpp

 1 // initialize director

 2     CCDirector *pDirector = CCDirector::sharedDirector();

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

 4 

 5     // enable High Resource Mode(2x, such as iphone4) and maintains low resource on other devices.

 6 //     pDirector->enableRetinaDisplay(true);

 7 

 8     // turn on display FPS

 9     pDirector->setDisplayStats(true);

10 

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

12     pDirector->setAnimationInterval(1.0 / 60);

13 

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

15     CCScene *pScene = HelloWorld::scene();

16 

17     // run

18     pDirector->runWithScene(pScene);

 第六行 用于开启视网膜屏的支持

第九行 显示左下角FPS 一位小数,最大60

 

 1 #ifndef __HELLOWORLD_SCENE_H__

 2 #define __HELLOWORLD_SCENE_H__

 3 

 4 #include "cocos2d.h"

 5 

 6 #include "SimpleAudioEngine.h"

 7 

 8 class HelloWorld : public cocos2d::CCLayer

 9 {

10 public:

11     // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone

12     virtual bool init();  

13 

14     // there's no 'id' in cpp, so we recommand to return the exactly class pointer

15     static cocos2d::CCScene* scene();

16     

17     // a selector callback

18     void menuCloseCallback(CCObject* pSender);

19 

20     // implement the "static node()" method manually

21     LAYER_CREATE_FUNC(HelloWorld);

22 };

第12行 初始化init()方法

第21行 是cocos2dx的新写法

LAYER_NODE_FUNC(HelloWorld);//cocos2dx 1.0 的写法

LAYER_CREATE_FUNC(HelloWorld);//cocos2dx 2.0 的写法