CCControlPotentiometer是電位計按鈕,和CCControlSlider的用法很相似。關于控件使用時的一些配置,請參見文章:UI開發之控件類-CCControlButton。
bool HelloWorld::init(){ bool bRet = false; do { CC_BREAK_IF(!CCLayer::init()); //CCControlPotentiometer參數是底座,進度條,控制按鈕圖片資源 CCControlPotentiometer * potentiometer = CCControlPotentiometer::create("potentiometerTrack.png", "potentiometerProgress.png","potentiometerButton.png"); //設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); //添加事件監聽 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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