cocos2dx中精灵点击事件处理的两种方式——Sprite和ImageView

1. ImageView 的方式：封装的Widget组件ImageVIew实现了类似按钮的监听事件，所以处理起来很方便直接

ImageView*		_pPokerImageView;

_pPokerImageView = ImageView::create(tmpStr);
_pPokerImageView->setAnchorPoint(Vec2(0, 0));
_pPokerImageView->setTouchEnabled(true);
addChild(_pPokerImageView);
_pPokerImageView->addTouchEventListener([this](Ref* pSender,Widget::TouchEventType type)
{
if (type == Widget::TouchEventType::ENDED)
{
PokerEventStatus tmpStatus = (getStatusValue() == SelectedStatus) ? NormalStatus : SelectedStatus;
updateSelectedSigned(tmpStatus);

if (getStatusValue() == SelectedStatus)
{
updateSelectedSigned(SelectedStatus);
}
else
{
updateSelectedSigned(NormalStatus);
}
}

2.Sprite的方式：需要手动实现监听事件代码，而且需要根据坐标，size去做精灵点击区域判断，写起来稍微复杂点，不过条条道路通罗马，多点方式，多种选择

</pre><pre name="code" class="cpp">EventListenerTouchOneByOne* _spriteListener;
Sprite*		_pPokerSprite;

/* 添加事件监听 */
_spriteListener = EventListenerTouchOneByOne::create();

_spriteListener->onTouchBegan = [this](Touch* touch, Event* event) -> bool {

/* 获取事件所绑定的 target */
auto target = event->getCurrentTarget();

/* 获取当前点击点所在相对按钮的位置坐标 */
Vec2 locationInNode = target->convertToNodeSpace(touch->getLocation());
Size targetSize = target->getContentSize();
Rect rect = Rect(_pPokerSprite->getPositionX(), _pPokerSprite->getPositionY(), COCOSNODE_WIDTH(_pPokerSprite), COCOSNODE_HEIGHT(_pPokerSprite));

bool isClicked = rect.containsPoint(locationInNode);
/* 点击范围判断 */
if (isClicked)
{
PokerEventStatus tmpStatus = (getStatusValue() == SelectedStatus) ? NormalStatus : SelectedStatus;
updateSelectedSigned(tmpStatus);

if (getStatusValue() == SelectedStatus)
{
updateSelectedSigned(SelectedStatus);
}
else
{
updateSelectedSigned(NormalStatus);
}
}

/* 此处一定要动态设置事件吞噬，否则层只会响应最后一张加入精灵的事件 */
_spriteListener->setSwallowTouches(isClicked);

return isClicked;
};

在init时同时初始化精灵，加入层

_pPokerSprite = Sprite::createWithTexture(pChessTexture, tmpRect);
_pPokerSprite->setAnchorPoint(Vec2(0, 0));
addChild(_pPokerSprite);

然后在onEnter里加入监听：

void TBBullFightPoker::onEnter(void)
{
Node::onEnter();

do
{
CC_BREAK_IF(!_pPokerSprite);

_eventDispatcher->addEventListenerWithSceneGraphPriority(_spriteListener, _pPokerSprite);

} while (0);
}

同样在onExit里删除监听：

void TBBullFightPoker::onExit(void)
{
_eventDispatcher->removeEventListener(_spriteListener);

Node::onExit();
}