Cocos2d-x進度條倒計時實現

素材：

實現：

//進度條背景
	CCSprite *progressbgSprite;
	progressbgSprite = CCSprite::create("time_slot-hd.png")	;
	progressbgSprite->setAnchorPoint(ccp(0,0));	//修改定點對應點
	progressbgSprite->setPosition(ccp(0, size.height-22));
	progressbgSprite->setScaleX(0.4f);
	progressbgSprite->setScaleY(0.7f);
	this->addChild(progressbgSprite, 1);
	progressbgSprite->setVisible(true);

	//進度條正面紅條
	CCSprite *progressSprite = CCSprite::create("time_bars-hd.png");
	progress = CCProgressTimer::create(progressSprite);//創建進度條
	progress->setAnchorPoint(ccp(0,0));
	progress->setType(kCCProgressTimerTypeBar);	//中間爲從左向右的進度條，類型爲水平
	progress->setScaleX(0.4f);
	progress->setScaleY(0.7f);
	progress->setPosition(ccp(0,size.height-22));

	//進度動畫運動方向
	progress->setMidpoint(ccp(0,0));
	//進度條寬高變化
	progress->setBarChangeRate(ccp(1,0)); //設置進度條爲從左向右隨進度增長而顯現
	progress->setPercentage(100.0f);//值
	this->addChild(progress,1);
	progress->setVisible(true);

讓進度條1秒減一點，直到爲0

 void Game::update(float dt)
 {	 
	 int cu=progress->getPercentage(); //獲取進度條的值
	 if (cu > 0)
	 {
		 cu=cu-1.0f;
		 progress->setPercentage(cu); //設置進度條的值
		 CCString *str = CCString::createWithFormat("%d",cu);
		 numsTTF->setString(str->getCString());//設置進度條上字的值
	 }
 }

結果：