#include "../CCControlScene.h"class CCControlSliderTest : public CCControlScene{public:    CCControlSliderTest();    virtual ~CCControlSliderTest();    bool init();    void valueChanged(CCObject *sender, CCControlEvent controlEvent);protected:    CCLabelTTF* m_pDisplayValueLabel;    CONTROL_SCENE_CREATE_FUNC(CCControlSliderTest)};

CCControlSliderTest::~CCControlSliderTest(){    CC_SAFE_RELEASE_NULL(m_pDisplayValueLabel);}

bool CCControlSliderTest::init(){    if (CCControlScene::init())    {        CCSize screenSize = CCDirector::sharedDirector()->getWinSize();        // Add a label in which the slider value will be displayed        m_pDisplayValueLabel = CCLabelTTF::create("Move the slider thumb!\nThe lower slider is restricted." ,"Marker Felt", 32);        m_pDisplayValueLabel->retain();        m_pDisplayValueLabel->setAnchorPoint(ccp(0.5f, -1.0f));        m_pDisplayValueLabel->setPosition(ccp(screenSize.width / 1.7f, screenSize.height / 2.0f));        addChild(m_pDisplayValueLabel);        // Add the slider//第一个参数是背景，第二个参数是进度条，第三个参数表示拖动按钮        CCControlSlider *slider = CCControlSlider::create("extensions/sliderTrack.png","extensions/sliderProgress.png" ,"extensions/sliderThumb.png");        slider->setAnchorPoint(ccp(0.5f, 1.0f));        slider->setMinimumValue(0.0f); // Sets the min value of range        slider->setMaximumValue(5.0f); // Sets the max value of range        slider->setPosition(ccp(screenSize.width / 2.0f, screenSize.height / 2.0f + 16));        slider->setTag(1);        // When the value of the slider will change, the given selector will be call//当进度值改变时，触发的函数        slider->addTargetWithActionForControlEvents(this, cccontrol_selector(CCControlSliderTest::valueChanged), CCControlEventValueChanged);        CCControlSlider *restrictSlider = CCControlSlider::create("extensions/sliderTrack.png","extensions/sliderProgress.png" ,"extensions/sliderThumb.png");        restrictSlider->setAnchorPoint(ccp(0.5f, 1.0f));        restrictSlider->setMinimumValue(0.0f); // Sets the min value of range        restrictSlider->setMaximumValue(5.0f); // Sets the max value of range//设置允许的最大值和最小值        restrictSlider->setMaximumAllowedValue(4.0f);        restrictSlider->setMinimumAllowedValue(1.5f);        restrictSlider->setValue(3.0f);        restrictSlider->setPosition(ccp(screenSize.width / 2.0f, screenSize.height / 2.0f - 24));        restrictSlider->setTag(2);    //same with restricted        restrictSlider->addTargetWithActionForControlEvents(this, cccontrol_selector(CCControlSliderTest::valueChanged), CCControlEventValueChanged);        addChild(slider);            addChild(restrictSlider);        return true;    }    return false;}

void CCControlSliderTest::valueChanged(CCObject *sender, CCControlEvent controlEvent){    CCControlSlider* pSlider = (CCControlSlider*)sender;    // Change value of label.    if(pSlider->getTag() == 1)        m_pDisplayValueLabel->setString(CCString::createWithFormat("Upper slider value = %.02f", pSlider->getValue())->getCString());      if(pSlider->getTag() == 2)        m_pDisplayValueLabel->setString(CCString::createWithFormat("Lower slider value = %.02f", pSlider->getValue())->getCString());  }//pSlider->getValue()可以获取滑动条的值