cocos2dx-cpptest的结构

画的不是太清楚，这里详细描述下：

AppDelegate是一个单例类。表示该应用的。入口为：main.cpp

# include "main.h"
# include "AppDelegate.h"
USING_NS_CC; //#defineUSING_NS_CC usingnamespacecocos2d
int APIENTRY_tWinMain(HINSTANCEhInstance,
HINSTANCEhPrevInstance,
LPTSTRlpCmdLine,
int nCmdShow)
{
//UNREFERENCED_PARAMETER用于在VC编译器下告知编译器，不必检测改变量是否使用的警告。
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
//创建一个cocos2dx单例类
AppDelegateapp;
return Application : : getInstance() - > run();
}

当run方法执行后，经过一系列的处理，系统会调用AppDelegate的applicationDidFinishLaunching方法。这里有必要讲下AppDelegate中的3个方法：

applicationDidFinishLaunching应用启动会执行该方法。

applicationDidEnterBackground 应用暂停会执行该方法.

applicationWillEnterForeground当应用恢复运行会执行该方法。

进入applicationDidFinishLaunching，看下这里做了什么初始化的操作

   
   

    
    


    
    

    
    

    
    

    
    

   
   
   
   

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

    
    

   
   
  // As an example,load config file  // XXX: This should be loaded before the Director is initialized,  // XXX: but at this point,the director is already initialized  Configuration::getInstance()->loadConfigFile("configs/config-example.plist");  // initialize director  auto director = Director::getInstance();  auto glview = director->getOpenGLView();  if(!glview) {    glview = GLView::create("Cpp Tests");    director->setOpenGLView(glview);  }  director->setDisplayStats(true);  director->setAnimationInterval(1.0 / 60);  auto screenSize = glview->getFrameSize();  auto designSize = Size(480, 320);  auto fileUtils = FileUtils::getInstance();  std::vector<std::string> searchPaths;   if (screenSize.height > 320)  {    auto resourceSize = Size(960,204)">640);    searchPaths.push_back("hd");    searchPaths.push_back("ccs-res/hd");    searchPaths.push_back("ccs-res/hd/scenetest");    searchPaths.push_back("ccs-res/hd/scenetest/ArmatureComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/AttributeComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/BackgroundComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/EffectComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/LoadSceneEdtiorFileTest");    searchPaths.push_back("ccs-res/hd/scenetest/ParticleComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/SpriteComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/TmxMapComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/UIComponentTest");    searchPaths.push_back("ccs-res/hd/scenetest/TriggerTest");    searchPaths.push_back("ccs-res");    director->setContentScaleFactor(resourceSize.height/designSize.height);  }  else  {    searchPaths.push_back("ccs-res");    searchPaths.push_back("ccs-res/scenetest/ArmatureComponentTest");    searchPaths.push_back("ccs-res/scenetest/AttributeComponentTest");    searchPaths.push_back("ccs-res/scenetest/BackgroundComponentTest");    searchPaths.push_back("ccs-res/scenetest/EffectComponentTest");    searchPaths.push_back("ccs-res/scenetest/LoadSceneEdtiorFileTest");    searchPaths.push_back("ccs-res/scenetest/ParticleComponentTest");    searchPaths.push_back("ccs-res/scenetest/SpriteComponentTest");    searchPaths.push_back("ccs-res/scenetest/TmxMapComponentTest");    searchPaths.push_back("ccs-res/scenetest/UIComponentTest");    searchPaths.push_back("ccs-res/scenetest/TriggerTest");  }   fileUtils->setSearchPaths(searchPaths);#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)  // a bug in DirectX 11 level9-x on the device prevents ResolutionPolicy::NO_BORDER from working correctly  glview->setDesignResolutionSize(designSize.width, designSize.height, ResolutionPolicy::SHOW_ALL);else  glview->setDesignResolutionSize(designSize.width, ResolutionPolicy::NO_BORDER);endif  auto scene = Scene::create();  auto layer = new TestController();if (CC_TARGET_PLATFORM != CC_PLATFORM_WP8) && (CC_TARGET_PLATFORM != CC_PLATFORM_WINRT)  layer->addConsoleAutoTest();endif  layer->autorelease();  layer->addConsoleAutoTest();  scene->addChild(layer);  director->runWithScene(scene);  // Enable Remote Consoleif (CC_TARGET_PLATFORM != CC_PLATFORM_WINRT)  auto console = director->getConsole();  console->listenOnTCP(5678);  Configuration *conf = Configuration::getInstance();  bool isAutoRun = conf->getValue("cocos2d.x.testcpp.autorun", Value(false)).asBool();  if(isAutoRun)  {    layer->startAutoRun();  }endif   return true;

这里做了那些操作：

1：初始化Configuration配置对象，并加载配置文件。这一定要在Director对象初始化之前完成

2：初始化Director对象 ，并初始化OpenGLView对象，设置到Director里面。

3：做屏幕适配。 resourceSize通过setContentScaleFactor适配到designSize,如果只有一套资源，那么resouceSize和designSize相同，

designSize通过setDesignResolutionSize适配到screenSize。我们后面使用的position都是相对designSize而言的。

4：然后就是初始化layer,scene，然后运行这个scene. 注意 director->runWithScene(scene);会使得scene和layer的引用计数加1。layer->autorelease();

5：剩下的是Console，没仔细了解。

现在程序进入TestController::TestController()，在这里初始化menu. 学习了c++11的function和匿名函数的用法。还有事件处理的方法。看下菜单项的事件处理：

void TestController::menuCallback(Ref * sender){ Director::getInstance()->purgeCachedData(); // get the userdata,it's the index of the menu item clicked auto menuItem = static_cast<MenuItem *>(sender); int idx = menuItem->getLocalZOrder() - 10000; // create the test scene and run it auto scene = g_aTestNames[idx].callback(); if (scene) { scene->runThisTest(); scene->release(); }}

Director :: getInstance ()-> purgeCachedData (); 清除缓存的数据。然后执行这个Scene的方法runThisTest()方法。看下ActionsTestScene的runThisScene方法把：