bool HelloWorld::init()
{
    if ( !CCLayer::init() )
    {
        return false;
    }
    
    CCSize winSize = CCDirector::sharedDirector()->getWinSize();
 
    
    CCControlSlider *slider = CCControlSlider::create("sliderBg.png","sliderProgress.png","sliderThumb.png");
    slider->setMaximumAllowedValue(100);
    slider->setMinimumAllowedValue(0);
    slider->setPosition(ccp(200,170));
    slider->addTargetWithActionForControlEvents(this,cccontrol_selector(HelloWorld::valueChange),CCControlEventValueChanged);
    this->addChild(slider);
    
    return true;
}
 
void HelloWorld::valueChange(CCObject *pSender)
{
    CCControlSlider *slider = (CCControlSlider *)pSender;
    float value = slider->getValue();
    
    CCLog("value:%.2f",value);
}