cocos2dx之创建CCControlSlider

采用CCControlSlider创建，代码如下：

CCControlSlider *slider = CCControlSlider::create("extensions/sliderTrack.png","extensions/sliderProgress.png" ,"extensions/sliderThumb.png");

	slider->setAnchorPoint(ccp(0.5, 1.0f));
	slider->setPosition(ccp(visibleSize.width / 2.0f, visibleSize.height / 2.0f));
	slider->setMinimumValue(0.1f);
	slider->setMaximumValue(100.0f);
	slider->setTag(1);

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

	this->addChild(slider, 1);

/** Kinds of possible events for the control objects. */
enum 
{
    CCControlEventTouchDown           = 1 << 0,    // A touch-down event in the control.
    CCControlEventTouchDragInside     = 1 << 1,    // An event where a finger is dragged inside the bounds of the control.
    CCControlEventTouchDragOutside    = 1 << 2,    // An event where a finger is dragged just outside the bounds of the control. 
    CCControlEventTouchDragEnter      = 1 << 3,    // An event where a finger is dragged into the bounds of the control.
    CCControlEventTouchDragExit       = 1 << 4,    // An event where a finger is dragged from within a control to outside its bounds.
    CCControlEventTouchUpInside       = 1 << 5,    // A touch-up event in the control where the finger is inside the bounds of the control. 
    CCControlEventTouchUpOutside      = 1 << 6,    // A touch-up event in the control where the finger is outside the bounds of the control.
    CCControlEventTouchCancel         = 1 << 7,    // A system event canceling the current touches for the control.
    CCControlEventValueChanged        = 1 << 8      // A touch dragging or otherwise manipulating a control, causing it to emit a series of different values.
};

还可以建立色盘，利用CCControlColourPicker,具体代码如下：

void MyControlLayerItem::initLayer() {

	CCSize size = CCDirector::sharedDirector()->getWinSize();
	CCControlColourPicker *control = CCControlColourPicker::create();
	control->setPosition(ccp(size.width / 3.0f, size.height / 3.0f));
	control->setColor(ccc3(255, 0, 0));
	control->addTargetWithActionForControlEvents(
												 this,
												 cccontrol_selector(MyControlLayerItem::valueChange),
												 CCControlEventValueChanged);
	this->addChild(control, 2);
}