CCControlPotentiometer是电位计按钮，和CCControlSlider的用法很相似。关于控件使用时的一些配置，请参见文章：UI开发之控件类-CCControlButton。
bool HelloWorld::init() { bool bRet = false; do { CC_BREAK_IF(!CCLayer::init()); //CCControlPotentiometer参数是底座，进度条，控制按钮图片资源 CCControlPotentiometer * potentiometer = CCControlPotentiometer::create("potentiometerTrack.png", "potentiometerProgress.png","potentiometerButton.png"); //设置最大值和最小值以及初值 potentiometer->setMaximumValue(100.0); potentiometer->setMinimumValue(0.0); potentiometer->setValue(50); potentiometer->setPosition(ccp(240,160)); this->addChild(potentiometer); //添加事件监听 potentiometer->addTargetWithActionForControlEvents(this,cccontrol_selector(HelloWorld::valueChanged), CCControlEventValueChanged); bRet = true; } while(0); return bRet; } void HelloWorld::valueChanged(CCObject * pSender,CCControlEvent controlEvent) { CCControlPotentiometer * potentiometer = (CCControlPotentiometer *)pSender; CCString * string = CCString::createWithFormat("%f",potentiometer->getValue()); CCLog(string->getCString()); }
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