创建一个弹出层

  
/* 功能 
 * 1. 弹出层的基类, 比下层拥有更高的优先级, 用于屏蔽下层,及本层外触摸事件 
 * 2. 提供一个容量,及相应方法,用于装纳需要处理事件的对象 CCTouchDelegate*对象,  
 */  
  
  
#ifndef __MythLeague__UpperLayer__  
#define __MythLeague__UpperLayer__  
  
#include "Global/Constants.h"  
#include "CommonLayer/TouchLogicLayer.h"  
  
class UpperLayer : public  TouchLogicLayer{  
      
public:  
   UpperLayer();  
    virtual ~UpperLayer();  
      
    bool init();  
          
    void onEnter();  
    void onExit();  
    void registerWithTouchDispatcher();  
      
    void appendToTouchDispatch(cocos2d::CCTouchDelegate* p_touchableObject);  
      
#pragma mark 触摸相关  
    //开始  
    bool ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);  
      
    //移动  
    void ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);        
    //结束  
    void ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);  
      
    //点击home键或其它方式引起的取消  
    void ccTouchCancelled(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);  
      
      
public:  
    //cocos2d::CCArray* m_touchDispatchTable;  
    std::vector<cocos2d::CCTouchDelegate*> m_touchDispatchTable;  
    int m_iIndex;//m_iIndex-1为实际索引  
};  
  
#endif /* defined(__MythLeague__UpperLayer__) */  
//  
//  
  
#include "UpperLayer.h"  
  
using namespace cocos2d;  
  
UpperLayer::UpperLayer(){  
      
}  
UpperLayer::~UpperLayer(){  
      
      
}  
  
bool UpperLayer::init(){  
    bool l_bResult = true;  
    do {  
        if(!TouchLogicLayer::init()){  
            l_bResult = false;  
        }                  
          
    } while (0);  
    return l_bResult;  
}  
 void UpperLayer::onEnter(){  
    TouchLogicLayer::onEnter();  
}  
void UpperLayer::onExit(){  
    TouchLogicLayer::onExit();  
}  
  
void UpperLayer::registerWithTouchDispatcher()  
{  
    cocos2d::CCDirector* pDirector = cocos2d::CCDirector::sharedDirector();  
    pDirector->getTouchDispatcher()->addTargetedDelegate(this, kCCMenuHandlerPriority-1, true);  
}  
  
void UpperLayer::appendToTouchDispatch(CCTouchDelegate* p_touchableObject){  
    //断言,p_touchableLayer是CCLayer*类型, (可以是继承)  
    CCAssert(dynamic_cast<CCTouchDelegate*>(p_touchableObject) != NULL, "p_touchableLayer must be a layer");  
    m_touchDispatchTable.push_back(p_touchableObject);  
}  
  
#pragma mark 触摸相关  
//开始  
bool UpperLayer::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){  
    //super  
    TouchLogicLayer::ccTouchBegan(pTouch, pEvent);  
      
    m_iIndex = Common_Empty;  
    CCTouchDelegate* l_touchAble = NULL;  
    int l_iIndex = 0;  
    for (; l_iIndex<m_touchDispatchTable.size(); l_iIndex++) {  
        l_touchAble = m_touchDispatchTable[l_iIndex];  
        if (l_touchAble && l_touchAble->ccTouchBegan(pTouch, pEvent))  
        {  
            m_iIndex = l_iIndex;  
            break;  
        }  
    }      
    return true;  
}  
  
//移动  
void UpperLayer::ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){  
    //super  
    TouchLogicLayer::ccTouchMoved(pTouch, pEvent);  
      
    if (m_iIndex >= 0) {  
        CCTouchDelegate* l_touchAble = m_touchDispatchTable[m_iIndex];  
        l_touchAble->ccTouchMoved(pTouch, pEvent);  
    }  
}  
  
//结束  
void UpperLayer::ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){  
    //super  
    TouchLogicLayer::ccTouchEnded(pTouch, pEvent);  
      
    if (m_iIndex >= 0) {  
        CCTouchDelegate* l_touchAbleLayer = m_touchDispatchTable[m_iIndex];  
        l_touchAbleLayer->ccTouchEnded(pTouch, pEvent);  
    }  
}  
  
//点击home键或其它方式引起的取消  
void UpperLayer::ccTouchCancelled(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){  
      
}  
所有的弹出层，只要继承一下这个就可以，他的优点是事件分发由自己来控制，比较灵活