触碰事件监听器

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auto listen = EventListenerTouchOneByOne::create();

listen->onTouchBegan = CC_CALLBACK_2( Hero::onTouchBegan,this);

listen->onTouchMoved = CC_CALLBACK_2( Hero::onTouchMoved, this);

listen->onTouchEnded = CC_CALLBACK_2( Hero::onTouchEnded, this);

listen->onTouchCancelled = CC_CALLBACK_2(Hero::onTouchCancelled, this);

listen->setSwallowTouches(false);

_eventDispatcher->addEventListenerWithFixedPriority(listen,-129);

//这里-129只是标识，可以用对象来做标识，比如sprite,this...这样对象移除，事件监听也会被移除

//事件监听器的分层，决定于注册的对象层次，相同对象则取决于注册先后顺序

//setSwallowTouches决定是否拦截触碰事件，如果为true，则拦截，不往下分发

//移除

Node::_eventDispatcher->removeAllEventListeners();

Node::_eventDispatcher->removeEventListener(xxx);

Node::_eventDispatcher->removeEventListenersForType(xxx);

Node::_eventDispatcher->removeEventListenersForTarget(xxx);

//============================================分割线=========================================================

//添加按钮监听。

MenuItemSprite* pMenuItemBack =addMenuItemSprite("xxx.png",Point::ANCHOR_TOP_LEFT,Point(8,8),CC_CALLBACK_0(GDMJDeskMenu::menuBackCB,this));

newGameItem->setPosition(Point( 40, 20));

newGameItem->setEnabled(true);

auto menu = Menu::create(pMenuItemBack,NULL);

menu->setPosition(Point(0,0));

addChild(menu, GAME_MENU_ORDER_MENU,MJGAME_DESK_MENU_BTN);

//menu按钮监听是该场景最上层，且事件不会下发的。

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