cocos2dx 3.X 如何给一个Sprite添加触摸事件，使其按住Sprite出发一个方法，松

1.首先头文件定义事件处理的函数原型

private:

bool onTouchBegan(Touch* tTouch,Event* eEvent)//手指按下事件

void onTouchMoved(Touch* tTouch,Event* eEvent)//手指移动事件

void onTouchEnded(Touch* tTouch,Event* eEvent)//手指离开事件

2.实现原型

bool ShopItem::onTouchBegan(Touch* tTouch,Event* eEvent){

　if (sprite->getBoundingBox().containsPoint(tTouch->getLocation())){//判断触摸点是否在目标的范围内

/**这里为事件内容**/

return true

　}else

return false

　}

}

void ShopItem::onTouchMoved(Touch* tTouch,Event* eEvent){

/**这里为事件内容**/

}

void ShopItem::onTouchEnded(Touch* tTouch,Event* eEvent){

/**这里为事件内容**/

}

3.绑定事件

auto listener = EventListenerTouchOneByOne::create()

listener->onTouchBegan = CC_CALLBACK_2(ShopItem::onTouchBegan, this)

listener->onTouchMoved = CC_CALLBACK_2(ShopItem::onTouchMoved, this)

listener->onTouchEnded = CC_CALLBACK_2(ShopItem::onTouchEnded, this)

this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, sprite)

在onToucheBegan里面设置精灵的position就好了

auto sp = this->getChildByTag(123)//假设精灵tag为123

CCPoint touchLocation = touch->getLocation()// Get the touch position

touchLocation = this->convertToNodeSpace(touchLocation)//转换坐标系

sp->setPosition(touchLocation)

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