Cocos结构

基类:CApplicationProtocol

纯虚函数virtual bool applicationDidFinishLaunching() = 0;

CCApplication继承于CCApplicationProtoco:

int run();//调用applicationDidFinishLaunching();

 static CCApplication* sharedApplication(); //返回sm_pSharedApplication

 static CCApplication* sm_pSharedApplication;//构造函数在构造时 sm_pSharedApplication=this,即在自类调用父类的构造函数时，把子类的this给父类，在父类调用run函数时，调用的是自类已经实现的applicationDidFinishLaunching();这是代理模式

AppDelegate继承于CCApplication 实现纯虚函数applicationDidFinishLaunching();

main:

AppDelegate app;

 return CCApplication::sharedApplication()->run();