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1、添加单点触摸事件，单点触摸事件有优先级，bSwallowsTouches是否吞噬，高优先级的会优先响应，而且可以吞噬事件，不让触摸事件往低优先级传递。void CCTouchDispatcher::addTargetedDelegate(CCTouchDelegate *pDelegate, int nPriority, bool bSwallowsTouches){        CCTouchHandler *pHandler = CCTargetedTouchHandler::handlerWithDelegate(pDelegate, nPriority, bSwallowsTouches);    if (! m_bLocked)    {        forceAddHandler(pHandler, m_pTargetedHandlers);    }    else    {        /* If pHandler is contained in m_pHandlersToRemove, if so remove it from m_pHandlersToRemove and return.         * Refer issue #752(cocos2d-x)         */        if (ccCArrayContainsValue(m_pHandlersToRemove, pDelegate))        {            ccCArrayRemoveValue(m_pHandlersToRemove, pDelegate);            return;        }        //CCArray* m_pHandlersToAdd这个可以理解为一个临时保存CCTouchHandler的地方，	//m_bLocked 如果这个值为true，这把CCTouchHandler先加入到m_pHandlersToAdd，	//然后在合适的时间，即CCTouchDispatcher::touches函数中，再把m_pHandlersToAdd数组里面	//CCTouchHandler加入到m_pTargetedHandlers或者m_pStandardHandlers中。        m_pHandlersToAdd->addObject(pHandler);        m_bToAdd = true;    }}-->>//// handlers management根据优先级进行排序，然后添加到单点触摸事件列表中,由此可知，//值越小，优先级越高//void CCTouchDispatcher::forceAddHandler(CCTouchHandler *pHandler, CCArray *pArray){    unsigned int u = 0;    CCObject* pObj = NULL;    CCARRAY_FOREACH(pArray, pObj)     {         CCTouchHandler *h = (CCTouchHandler *)pObj;         if (h)         {             if (h->getPriority() < pHandler->getPriority())             {                 ++u;             }              if (h->getDelegate() == pHandler->getDelegate())             {                 CCAssert(0, "");                 return;             }         }     }    pArray->insertObject(pHandler, u);}2、移除：和加入类似void CCTouchDispatcher::removeDelegate(CCTouchDelegate *pDelegate){    if (pDelegate == NULL)    {        return;    }    if (! m_bLocked)    {        forceRemoveDelegate(pDelegate);    }    else    {        /* If pHandler is contained in m_pHandlersToAdd, if so remove it from m_pHandlersToAdd and return.         * Refer issue #752(cocos2d-x)         */        CCTouchHandler *pHandler = findHandler(m_pHandlersToAdd, pDelegate);        if (pHandler)        {            m_pHandlersToAdd->removeObject(pHandler);            return;        }        ccCArrayAppendValue(m_pHandlersToRemove, pDelegate);        m_bToRemove = true;    }}-->>void CCTouchDispatcher::removeDelegate(CCTouchDelegate *pDelegate){    if (pDelegate == NULL)    {        return;    }    if (! m_bLocked)    {        forceRemoveDelegate(pDelegate);    }    else    {        /* If pHandler is contained in m_pHandlersToAdd, if so remove it from m_pHandlersToAdd and return.         * Refer issue #752(cocos2d-x)         */        CCTouchHandler *pHandler = findHandler(m_pHandlersToAdd, pDelegate);        if (pHandler)        {            m_pHandlersToAdd->removeObject(pHandler);            return;        }        ccCArrayAppendValue(m_pHandlersToRemove, pDelegate);        m_bToRemove = true;    }}

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