cocos2d-x lua 触摸事件

version: cocos2d-x 3.6

1.监听

function GameLayer:onEnter()
    local eventDispatcher = self:getEventDispatcher()

    local function onTouchBegan(touch,event)
        local locationInNode = self:convertToNodeSpace(touch:getLocation())
        local s = self:getContentSize()
        local rect = cc.rect(0,0,s.width,s.height)

        if cc.rectContainsPoint(rect,locationInNode) then
            self:setColor(cc.c3b(255,0))
            return true
        end

        return false    
    end

    local function onTouchMoved(touch,event)

    end

    local  function onTouchEnded(touch,event)
        self:setColor(cc.c3b(255,255,255))
    end

    local listener = cc.EventListenerTouchOneByOne:create()
    self._listener = listener
    listener:setSwallowTouches(true)

    listener:registerScriptHandler(onTouchBegan,cc.Handler.EVENT_TOUCH_BEGAN )
    listener:registerScriptHandler(onTouchMoved,cc.Handler.EVENT_TOUCH_MOVED )
    listener:registerScriptHandler(onTouchEnded,cc.Handler.EVENT_TOUCH_ENDED )

    if 0 == self._fixedPriority then
        eventDispatcher:addEventListenerWithSceneGraphPriority(listener,self)
    else
        eventDispatcher:addEventListenerWithFixedPriority(listener,self._fixedPriority)
    end
end

2.移除

function TouchableSpriteWithFixedPriority:onExit()
    local eventDispatcher = self:getEventDispatcher()
    eventDispatcher:removeEventListener(self._listener)
end

3.注意

onEnter和onExit在lua中不会因节点别add和remove而直接被调用，当子节点被父节点add和remove时，会发送enter和exit的消息，所以需要再初始化节点的时候，监听消息，并在收到消息后调用onEnter或onExit。
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