Cocos2d-x中拖动滑块的控件类CCControlSlider使用

//包含头文件
#include"cocos-ext.h"
USING_NS_CC_EXT;  //使用命名空间extension

//在init函数中加入
//_pSliderLabel为CCLabelTTF类型，用来显示滑块滑动时候的数字

_pSliderLabel = CCLabelTTF::create("", "", 30);
_pSliderLabel->setPosition(ccp(200,200));
addChild(_pSliderLabel);

 
//创建CCControlSlider空间，参数为背景图片，进度条图片，滑块图片
CCControlSlider *pSlider = CCControlSlider::create("sliderTrack.png", "sliderProgress.png", "sliderThumb.png");

//设置最大最小值
pSlider->setMinimumValue(0.0f);
pSlider->setMaximumValue(10.0f);

pSlider->setPosition(ccp(size.width/3, size.height/3));

 

// 添加回调函数，当滑块被拖动时被调用
pSlider->addTargetWithActionForControlEvents(this, cccontrol_selector(HelloWorld::changeValue), CCControlEventValueChanged);

/*参数三：Kinds of possible events for the control objects.

 CCControlEventTouchDown           = 1 << 0,    // A touch-down event in the control.

 CCControlEventTouchDragInside     = 1 << 1,    // An event where a finger is draggedinside the bounds of the control.

 CCControlEventTouchDragOutside    = 1 << 2,    // An event where a finger is draggedjust outside the bounds of the control.

 CCControlEventTouchDragEnter      = 1 << 3,    // An event where a finger is draggedinto the bounds of the control.

 CCControlEventTouchDragExit       = 1 << 4,    // An event where a finger is draggedfrom within a control to outside its bounds.

 CCControlEventTouchUpInside       = 1 << 5,    // A touch-up event in the controlwhere the finger is inside the bounds of the control.

 CCControlEventTouchUpOutside      = 1 << 6,    // A touch-up event in the controlwhere the finger is outside the bounds of the control.

 CCControlEventTouchCancel         = 1 << 7,    // A system event canceling thecurrent touches for the control.

 CCControlEventValueChanged        = 1 << 8      // A touch dragging or otherwisemanipulating a control, causing it to emit a series of different values.
*/
addChild(pSlider);


//添加回调函数
void HelloWorld::changeValue(CCObject *sender, CCControlEvent controlEvent)
{
    CCControlSlider *pSlider = (CCControlSlider *)sender;
    //通过获取值来设置label的值
    _pSliderLabel->setString(CCString::createWithFormat("value = %f", pSlider->getValue())->getCString());
}

//编译连接，发现链接出错，无法解析的外部符号，汗啊。

//百度一下吧：原来是没有找到连接的文件

//解决办法：

//右键项目属性->配置属性->链接器里面的附加依赖项,加上libCocosDenshion.lib和libExtensions.lib

//搞定，哈哈。
//包含头文件
#include"cocos-ext.h"
USING_NS_CC_EXT;