cocos2dx CCControlSlider 滑动条

//滑动条

    CCControlSlider * slider = CCControlSlider ::create("sliderBg.png", "sliderProgress.png", "sliderThumb.png");

    slider->setPosition(ccp(200, 170));

//    设置滑动条最大值

    slider->setMaximumValue(100);

    //    设置滑动条最小值

    slider->setMinimumValue(0);

    addChild(slider,0,921);

//    设置监听 ， 但滑动条的值发生变化后 ， 会相应 valueChanged 函数

//CCControlEventValueChanged值改变

    slider->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::valueChanged), CCControlEventValueChanged);

//    用于展示当前滑动条的滑动值

    CCLabelTTF * label = CCLabelTTF ::create();

    label->setColor(ccc3(255, 0, 0));

    label->setPosition(ccp(200, 200));

    

    label->setString(CCString::createWithFormat("滑动条当前值＝ %0.02f",slider->getValue())->getCString());

    addChild(label,0,922);

void HelloWorld::valueChanged()

{

//    利用tag 来确定 

    CCControlSlider *  slider = (CCControlSlider * )this->getChildByTag(921);

    CCLabelTTF * label =(CCLabelTTF * )this->getChildByTag(922);

    label->setString(CCString::createWithFormat("滑动条的当前值 ＝ %.02f" ,slider->getValue())->getCString());



}