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); }