#include "AppDelegate.h"
#include "HelloWorldScene.h"
USING_NS_CC;
AppDelegate::AppDelegate() 
{
//构造函数
}
AppDelegate::~AppDelegate() 
{
//析构函数
}
//程序启动完毕后进入这种方法/函数
bool AppDelegate::applicationDidFinishLaunching() {
    // initialize director初始化导演类
    CCDirector* pDirector = CCDirector::sharedDirector();
    CCEGLView* pEGLView = CCEGLView::sharedOpenGLView();
//设置oppenGL视图
    pDirector->setOpenGLView(pEGLView);
    // turn on display FPS是否打开FPS
    pDirector->setDisplayStats(true);
    // set FPS. the default value is 1.0/60 if you don‘t call this设置帧数 默认60帧
    pDirector->setAnimationInterval(1.0 / 60);
    // create a scene. it‘s an autorelease object创建一个场景
    CCScene *pScene = HelloWorld::scene();
    // run游戏真正的開始
    pDirector->runWithScene(pScene);
    return true;
}
// This function will be called when the app is inactive. When comes a phone call,it‘s be invoked too
//当程序进入后台,比方电话called
void AppDelegate::applicationDidEnterBackground() {
    CCDirector::sharedDirector()->stopAnimation();
    // if you use SimpleAudioEngine, it must be pause声音暂停
    // SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();
}
// this function will be called when the app is active again
//当程序又一次被激活
void AppDelegate::applicationWillEnterForeground() {
    CCDirector::sharedDirector()->startAnimation();
    // if you use SimpleAudioEngine, it must resume here声音恢复
    // SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();
}
原文:http://www.cnblogs.com/gcczhongduan/p/4313000.html