cocos2dx学习笔记：常用代码备份

最近项目中用到了cocos2dx来开发一个基于陀螺仪的demo，忙了半个星期，一边学习一边开发，总算搞了出来。这里备份下开发中学习到的一些cocos2dx知识。

常用代码备份：

效果：

淡入淡出：

    CCFadeIn *fadeIn = CCFadeIn::create(1.5f);
    CCFadeOut *fadeOut = CCFadeOut::create(1.5f);
    
    CCSequence *seq = CCSequence::createWithTwoActions(fadeIn, fadeOut);
    CCRepeatForever *rep = CCRepeatForever::create(seq);
    sprite->runAction(rep);

 菜单：

图像菜单：

	CCMenuItemImage *pCatchBtnItem = CCMenuItemImage::create(
		"catchA.png",
		"catchB.png",
		this,
		menu_selector(XXX::menuCallback));
	pCatchBtnItem->setAnchorPoint(ccp(0.5,0.5));
	pCatchBtnItem->setPosition(pSensorPoint->getPosition());
	pCatchBtnItem->setTag(10);

	// create menu, it's an autorelease object
	pCatchBtnMenu = CCMenu::create(pCatchBtnItem, NULL);
	pCatchBtnMenu->setPosition(CCPointZero);
	this->addChild(pCatchBtnMenu, 2);

 文字菜单：

CCLabelTTF* singlePersonlabel = CCLabelTTF::create("      ", "Arial",200);
CCMenuItemLabel* pSinglePersonMenuItem = CCMenuItemLabel::create(singlePersonlabel, this,
                                                                     menu_selector(XXX::showBeforeYouGame));
pSinglePersonMenuItem->setPosition(ccp(0,0));
pSinglePersonMenuItem->setAnchorPoint(ccp(0,0));
    
CCMenu* pMenu = CCMenu::create(pSinglePersonMenuItem, NULL);
pMenu->setPosition(CCPointZero);
beforeyougameSp->addChild(pMenu, 5);

 矩形，点：

常用矩形，点的宏：

CCRect scope = CCRectMake(x, y,size.width,size.height);
CCPoint point = ccp(x,y);
ccpAdd();
ccpSub(); 

//判断点是否在矩形内
if (scope.containsPoint(targetPos))
{
//。。。
}

动画缓存：

动画创建：

	CCSpriteFrameCache *cache = CCSpriteFrameCache::sharedSpriteFrameCache();
	cache->addSpriteFramesWithFile("background/animation.plist");
	char str[64] = {0};

	CCAnimation *pShoot = CCAnimation::create();
	pShoot->setDelayPerUnit(0.1f);
	pShoot->setRestoreOriginalFrame(true);
	for (int i = 0; i < 5; i++)
	{
		sprintf(str, "shoot%d.png", i);  
		pShoot->addSpriteFrame(cache->spriteFrameByName(str));
	}
	CCAnimationCache::sharedAnimationCache()->addAnimation(pShoot,"shoot");

 动画使用：

        CCAnimation *pA = CCAnimationCache::sharedAnimationCache()->animationByName("shoot");
        CCSprite *sp = CCSprite::create();
        sp->setPosition(ccp(pTelescope->getContentSize().width/2, pTelescope->getContentSize().height/2));
        pTelescope->addChild(sp);
        sp->runAction(CCAnimate::create(pA));

 时间：

获取当前秒：

long XX::getCurrSeconds()
{
	struct cc_timeval tv;
	CCTime::gettimeofdayCocos2d(&tv,NULL);
	return tv.tv_sec + tv.tv_usec / 1000000;
}