Cocos2d-x和时间有关的代码

用cocos2d-x获取系统时间，格式为年月日时分秒：

void GetTime(float dt)
 {
    struct tm *tm;
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
    //win32平台
    time_t timep;
    time(&timep);
    tm = localtime(&timep);
#else
    //android、ios平台

    struct cc_timeval now;
    CCTime::gettimeofdayCocos2d(&now, NULL);
    tm = localtime(&now.tv_sec);
#endif
     int year = tm->tm_year + 1900;
     int month = tm->tm_mon + 1;
     int day = tm->tm_mday;
     int hour=tm->tm_hour;
     int min=tm->tm_min;
     int second=tm->tm_sec;
}

实现游戏倒计时的代码：

在CCDirector中有个getScheduler()得到时刻表【调度者】，我们可以使用时刻表【调度者】CCScheduler，来暂停所有的调度。在CCScheduler暂停所有的调度是这样子的：

CCScheduler.h

/** Pause all selectors from all targets.
You should NEVER call this method, unless you know what you are doing.
//提示我们不应该调用此方法，但是目前我测试中没有出现什么问题
@since v2.0.0
*/
CCSet* pauseAllTargets();

CCSchedule.cpp

CCSet* CCScheduler::pauseAllTargets()
{
return pauseAllTargetsWithMinPriority(kCCPrioritySystem);
}

CCSet* CCScheduler::pauseAllTargetsWithMinPriority(int nMinPriority)
{
CCSet* idsWithSelectors = new CCSet();// setWithCapacity:50];
idsWithSelectors->autorelease();
// Custom Selectors
for(tHashSelectorEntry *element = m_pHashForSelectors; element != NULL;
element = (tHashSelectorEntry*)element->hh.next)
{
element->paused = true;
idsWithSelectors->addObject(element->target);
}

// Updates selectors
tListEntry *entry, *tmp;
if(nMinPriority < 0) { DL_FOREACH_SAFE( m_pUpdatesNegList, entry, tmp ) { if(entry->priority >= nMinPriority)
{
entry->paused = true;
idsWithSelectors->addObject(entry->target);
}
}
}

if(nMinPriority) paused = true;

idsWithSelectors->addObject(entry->target);

}

}

DL_FOREACH_SAFE( m_pUpdatesPosList, entry, tmp )

{

if(entry->priority >= nMinPriority)

{

entry->paused = true;

idsWithSelectors->addObject(entry->target);

}

}

return idsWithSelectors;

}

暂停之后，我们再次执行的时候需要恢复，方法如下：

CCScheduler.h

/** Resumes the target.

The ‘target‘ will be unpaused, so all schedule selectors/update will be ‘ticked‘ again.

If the target is not present, nothing happens.

@since v0.99.3

*/

void resumeTarget(CCObject *pTarget);

/** Resume selectors on a set of targets.

This can be useful for undoing a call to pauseAllSelectors.

@since v2.0.0

*/

void resumeTargets(CCSet* targetsToResume);

CCScheduler.cpp

void CCScheduler::resumeTarget(CCObject *pTarget)

{

CCAssert(pTarget != NULL, "");

// custom selectors

tHashSelectorEntry *pElement = NULL;

HASH_FIND_INT(m_pHashForSelectors, &pTarget, pElement);

if (pElement)

{

pElement->paused = false;

}

// update selector

tHashUpdateEntry *pElementUpdate = NULL;

HASH_FIND_INT(m_pHashForUpdates, &pTarget, pElementUpdate);

if (pElementUpdate)

{

CCAssert(pElementUpdate->entry != NULL, "");

pElementUpdate->entry->paused = false;

}

}

void CCScheduler::resumeTargets(CCSet* pTargetsToResume)

{

CCSetIterator iter;

for (iter = pTargetsToResume->begin(); iter != pTargetsToResume->end(); ++iter)

{

resumeTarget(*iter);

}

}

在看完源码之后，来说下实际运用：

点击暂停按钮：

void MainGameScene::pauseMenuCallBack( CCObject *pSender )
{
    FDDialogLayer *dialogLayer = FDDialogLayer::create(DIALOG_GAME_PAUSE);
    _m_pBeforeTargetSets = CCDirector::sharedDirector()->getScheduler()->pauseAllTargets();    //这是关键1
    _m_pBeforeTargetSets->retain();    //这是关键2

　　this->addChild(dialogLayer,500,500);

}    

点击恢复按钮：

}else if(m_pDialogSpecies == DIALOG_GAME_FORGROUND)
{
　　timeFlag = 1;//这是关键3，此tag用于图片切换
　　timeSprite = CCSprite::create(RESUME_FIR);

　　CCSize winSize = CCDirector::sharedDirector()->getWinSize();
　　timeSprite->setPosition(ccp(winSize.width/2,winSize.height/2));
　　this->addChild(timeSprite);

　　if (timeSprite) {
　　　　this->schedule(schedule_selector(FDDialogLayer::updateTime),1);//这是关键4 调度

　　}
}

void FDDialogLayer::updateTime(float dt)
{
　　if (timeFlag < 3) 　　{ 　　　　timeFlag++;　　　　char temp[32]; 　　　　sprintf(temp, "resume/t%d.png",timeFlag);　　　　CCTexture2D *texture = CCTextureCache::sharedTextureCache()->addImage(temp);

　　　　CCSize conSize = texture->getContentSize();
　　　　timeSprite->setTexture(texture);
　　　　timeSprite->setTextureRect(CCRectMake(0, 0, conSize.width, conSize.height));

　　}else
　　{
　　　　continueGame();//这是关键5 返回场景
　　　　this->unschedule(schedule_selector(FDDialogLayer::updateTime));
　　}
}

void FDDialogLayer::continueGame()

{

　　MainGameScene *mainGame = (MainGameScene*)CCDirector::sharedDirector()->getRunningScene()->getChildren()->objectAtIndex(0);

　　CCSet *set = mainGame->getBeforeTargetSets();//这是关键6，这是暂停所有调度者时的返回值

　　CCDirector::sharedDirector()->getScheduler()->resumeTargets(set);//这是关键7 恢复游戏

　　this->removeFromParentAndCleanup(true);

　　CCTextureCache::sharedTextureCache()->removeTextureForKey(RESUME_FIR);
　　CCTextureCache::sharedTextureCache()->removeTextureForKey(RESUME_SEC);
　　CCTextureCache::sharedTextureCache()->removeTextureForKey(RESUME_TIR);
}

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