从 请教三个个触摸事件问题 继续讨论：
经过两天的研究，今天终于实现了这个滑动选取功能。
我主要是实现卡牌滑动选取的功能。比如一共20张牌，我触摸起点是第10张，继续向左滑，经过的卡牌都会被选中，往回返的话原来选中的又会重新取消选中，最后松手，选中的牌弹起。
cocos2dx里面本身没有这个功能，但是靠我这个笨蛋的取巧实现了，现在贴上部分代码分享下：
auto listener = EventListenerTouchOneByOne::create();
listener->setSwallowTouches(false);
//触摸开始
listener->onTouchBegan = [=](Touch *touch, Event *event)
{
//把触摸牌组置为0,数量置为0；
memset(m_bTouchCard, 0, 25);
TouchCardIndex = 0;
auto target = static_cast<FKDSCardLayout *>(event->getCurrentTarget());
Point locationInNode = target->convertToNodeSpace(touch->getLocation());
Size size = target->getContentSize();
Rect rect = Rect(0, 0, size.width, size.height);
if (rect.containsPoint(locationInNode))
{
//得到卡牌的位置编号
int cardIndex = (int)(locationInNode.x / gameData->m_cardDistance);
if (cardIndex > target->getTag() - 1)
cardIndex = target->getTag() - 1;
cocos2d::log("触摸开始的牌是: %d", cardIndex);
//把触摸到的第一张牌加入触摸牌组
m_bTouchCard[0] = cardIndex;
TouchCardIndex = 1;
m_viewCard[cardIndex]->setOpacity(180);
return true;
}
return false;
};
//触摸经过
listener->onTouchMoved = [=](Touch *touch, Event *event)
{
auto target = static_cast<FKDSCardLayout *>(event->getCurrentTarget());
Point locationInNode = target->convertToNodeSpace(touch->getLocation());
Size size = target->getContentSize();
Rect rect = Rect(0, 0, size.width, size.height);
if (rect.containsPoint(locationInNode))
{
//得到卡牌的位置编号
int cardIndex = (int)(locationInNode.x / gameData->m_cardDistance);
if (cardIndex > target->getTag() - 1)
cardIndex = target->getTag() - 1;
//触摸点移动到了开始点左边
if(cardIndex - m_bTouchCard[0] <= 0)
{
//之前卡牌恢复原来透明度
for (BYTE i = 0; i < TouchCardIndex; ++i)
{
m_viewCard[m_bTouchCard[i]]->setOpacity(255);
}
for (BYTE i = 0; i <= m_bTouchCard[0] - cardIndex; ++i)
{
m_bTouchCard[i] = m_bTouchCard[0] - i;
m_viewCard[m_bTouchCard[0] - i]->setOpacity(180);
}
TouchCardIndex = m_bTouchCard[0] - cardIndex + 1;
}
//触摸点移动到了开始点右边
else if(cardIndex - m_bTouchCard[0] > 0)
{
//之前卡牌恢复原来透明度
for (BYTE i = 0; i < TouchCardIndex; ++i)
{
m_viewCard[m_bTouchCard[i]]->setOpacity(255);
}
for (BYTE i = 0; i <= cardIndex - m_bTouchCard[0]; ++i)
{
m_bTouchCard[i] = m_bTouchCard[0] + i;
m_viewCard[m_bTouchCard[0] + i]->setOpacity(180);
}
TouchCardIndex = cardIndex - m_bTouchCard[0] + 1;
}
}
};
//触摸结束
listener->onTouchEnded = [=](Touch *touch, Event *event)
{
//如果触摸到卡牌
EventBus::postEvent(FKDSEvent::TouchCardEndEvent(m_bTouchCard, TouchCardIndex));
//卡牌恢复原来透明度
for (BYTE i = 0; i < 25 - gameData->m_bCardCount[0]; ++i)
{
m_viewCard[i]->setOpacity(255);
}
};
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
希望对有需要的人有所帮助吧，自己一个人琢磨好费时间哒