Cocos2d-x CCProgressTimer

gistfile1.cpp

bool HelloWorld::init()
{
    if ( !CCLayer::init() )
    {
        return false;
    }

    CCSize size = CCDirector::sharedDirector()->getWinSize();
    CCSprite* sprite = CCSprite::create("Icon-72.png");
    CCProgressTimer* timer = CCProgressTimer::create(sprite);
    timer->setType(kCCProgressTimerTypeRadial);
    timer->setPosition(ccp(size.width/2, size.height/2));
    timer->setPercentage(0.0f);
    this->addChild(timer, 1, 1);
    
    this->scheduleUpdate();
    
    return true;
}

void HelloWorld::update(float delta) {
    CCProgressTimer* timer = (CCProgressTimer*)this->getChildByTag(1);
    float percent = timer->getPercentage();
    percent += 10.0f * delta;
    timer->setPercentage(percent);
    
    if (percent>100.0f) {
        this->unscheduleUpdate();
    }
}

thnks it's very useful.