cocos2d中 各种setTouchPriority无效的问题

概述转载请注明地址：http://www.voidcn.com/article/p-nsewocfp-mg.html CCTouchDispatcher中是这样分发触摸事件的： CCARRAY_FOREACH(m_pTargetedHandlers, pObj)//这里是遍历了一个注册过触摸事件的数组，按优先级排序 { pHandler = (C

转载请注明地址：http://www.jb51.cc/article/p-nsewocfp-mg.html

CCtouchdispatcher中是这样分发触摸事件的：

CCARRAY_FOREACH(m_pTargetedHandlers,pObj)//这里是遍历了一个注册过触摸事件的数组，按优先级排序            {                pHandler = (CCTargetedtouchHandler *)(pObj);                if (! pHandler)                {                   break;                }                bool bClaimed = false;                if (uIndex == CCtouchBEGAN)                {                    bClaimed = pHandler->getDelegate()->cctouchBegan(ptouch,pEvent);                    if (bClaimed)                    {                        pHandler->getClaimedtouches()->addobject(ptouch);                    }                } else                if (pHandler->getClaimedtouches()->containsObject(ptouch))                {                    // moved ended canceled                    bClaimed = true;                    switch (sHelper.m_type)                    {                    case CCtouchmoveD:                        pHandler->getDelegate()->cctouchmoved(ptouch,pEvent);                        break;                    case CCtouchendED:                        pHandler->getDelegate()->cctouchended(ptouch,pEvent);                        pHandler->getClaimedtouches()->removeObject(ptouch);                        break;                    case CCtouchCANCELLED:                        pHandler->getDelegate()->cctouchCancelled(ptouch,pEvent);                        pHandler->getClaimedtouches()->removeObject(ptouch);                        break;                    }                }                if (bClaimed && pHandler->isSwallowstouches())                {                    if (bNeedsMutableSet)                    {                        pMutabletouches->removeObject(ptouch);                    }                    break;                }            }

然后如果调用这里的 setPriority，就会重新排序数组： rearrangeHandlers

voID CCtouchdispatcher::setPriority(int nPriority,CCtouchDelegate *pDelegate){    CCAssert(pDelegate != NulL,"");    CCtouchHandler *handler = NulL;    handler = this->findHandler(pDelegate);    CCAssert(handler != NulL,"");	    if (handler->getPriority() != nPriority)    {        handler->setPriority(nPriority);        this->rearrangeHandlers(m_pTargetedHandlers);        this->rearrangeHandlers(m_pStandardHandlers);    }}

但是在业务层调用的 setPriority是这样的：

voID CCtouchHandler::setPriority(int nPriority){    m_nPriority = nPriority;}

所以你会发现如果在初始化一个控件的时候调用 setPriority就会有效，而在运行中动态更改就无效，就是因为初始化后的下一帧调用（调用onEnter时,会注册touchdelegate）会根据当前priority将其注册进那个数组：

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);}

所以，改变触摸分发数组的机会只有一次，之后如果想动态的改变优先级需要获取 touchdispatcher后设置，或者类似menu可以调用现成的函数 setHandlerPriority 总结

以上是内存溢出为你收集整理的cocos2d中 各种setTouchPriority无效的问题全部内容，希望文章能够帮你解决cocos2d中 各种setTouchPriority无效的问题所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。