cocosLua节点层添加点击事件

方式1：

local MainScene = class("MainScene", cc.load("mvc").ViewBase)

function MainScene:onCreate()
    -- add background image
    local layer = cc.Layer:create()
    layer:addTo(self)
    layer:addChild(display.newSprite("bg_0.jpg"):move(display.center))

    -- add HelloWorld label
    --local startBtn = cc.Label:createWithSystemFont("开始", "Arial", 20)
    local startBtn = cc.Sprite:create("GameScene_nn.png", cc.rect(760,0,250,80))
    startBtn:setScale(0.25,0.25)
    startBtn:move(display.center)
    layer:addChild(startBtn)

    --local tmpLayer = cc.Layer.create()
    local startLb = cc.Label:createWithSystemFont("开始", "Arial", 40)
    startBtn:addChild(startLb)
    startLb:setPosition(120,50)

    local function touchBegan(touch, event)
        --取得注册事件的节点，这里是layer
        local node = event:getCurrentTarget()
        --touch:getPreviousLocationInView():取得之前触摸点的位置信息 UI坐标
        --getPreviousLocation() :OpenGL坐标
        --getLocationInView():当前坐标
        --getLocation():
        print(touch)
        return false
    end
    local function touchMoved(touch, event)
        return false
    end
    local function touchEnded(touch, event)
        return false
    end
    local function touchCanceled(touch, event)
        return false
    end
    
    local listen = cc.EventListenerTouchOneByOne:create()
    listen:registerScriptHandler(touchBegan, cc.Handler.EVENT_TOUCH_BEGAN)
    listen:registerScriptHandler(touchMoved,cc.Handler.EVENT_TOUCH_MOVED)
    listen:registerScriptHandler(touchEnded,cc.Handler.EVENT_TOUCH_ENDED)
    listen:registerScriptHandler(touchCanceled,cc.Handler.EVENT_TOUCH_CANCELLED)

    local eventDispatcher = layer:getEventDispatcher()
    --节点添加的先后顺序为优先级的添加监听器方式，节点越上层，优先级越高
    --eventDispatcher:addEventListenerWithSceneGraphPriority(listen,layer)
    --void EventDispatcher::addEventListenerWithFixedPriority(EventListener* listener, int fixedPriority)
    --固定优先级的添加监听器方式,fixedPriority>0, 数值越小，优先级越高
    eventDispatcher:addEventListenerWithFixedPriority(listen, 1)
end
return MainScene


方式2：

   local function onTouch(eventType, x, y)
        if eventType == "began" then
            return true
        elseif eventType == "ended" then
            return onTouchEnded(x, y)
        end
    end

    layer:setTouchEnabled(true)
    layer:registerScriptTouchHandler(onTouch)


示例: 按钮点击后大小变化

local MainScene = class("MainScene", cc.load("mvc").ViewBase)

function MainScene:onCreate()
    -- add background image
    local layer = cc.Layer:create()
    layer:addTo(self)
    layer:addChild(display.newSprite("bg_0.jpg"):move(display.center))

    -- add HelloWorld label
    --local startBtn = cc.Label:createWithSystemFont("开始", "Arial", 20)
    local startBtn = cc.Sprite:create("GameScene_nn.png", cc.rect(760,0,250,80))
    startBtn:setScale(0.25,0.25)
    startBtn:move(display.center)
    layer:addChild(startBtn)

    --local tmpLayer = cc.Layer.create()
    local startLb = cc.Label:createWithSystemFont("开始", "Arial", 40)
    startBtn:addChild(startLb)
    startLb:setPosition(120,50)

    local startBtn1 = cc.Sprite:create("GameScene_nn.png", cc.rect(760,0,250,80))
    startBtn1:setScale(0.25,0.25)
    startBtn1:setPosition(cc.p(200,100))
    --startBtn1:move(display.center)
    layer:addChild(startBtn1)

    local function touchBegan(touch, event)

        local node = event:getCurrentTarget()
        local location = node:convertToNodeSpace(touch:getLocation())
        local targetSize = node:getContentSize()
        local rect = cc.rect(0,0,targetSize.width, targetSize.height)
        if cc.rectContainsPoint(rect, location) then
            node:setScale(0.21,0.21)
            if node==startBtn then
                print("click button 1")
            else
                print("click button 2")
            end
        end
        return true
    end
    local function touchMoved(touch, event)
        print("touchMoved")
        return false
    end
    local function touchEnded(touch, event)
        local node = event:getCurrentTarget()
        node:setScale(0.25,0.25)
        return true
    end
    local function touchCanceled(touch, event)
        print("touchCanceled")
        return false
    end
    
    local listen = cc.EventListenerTouchOneByOne:create()
    listen:registerScriptHandler(touchBegan, cc.Handler.EVENT_TOUCH_BEGAN)
    listen:registerScriptHandler(touchMoved,cc.Handler.EVENT_TOUCH_MOVED)
    listen:registerScriptHandler(touchEnded,cc.Handler.EVENT_TOUCH_ENDED)
    listen:registerScriptHandler(touchCanceled,cc.Handler.EVENT_TOUCH_CANCELLED)

    --local eventDispatcher = layer:getEventDispatcher()
    local eventDispatcher = cc.Director:getInstance():getEventDispatcher()
    eventDispatcher:addEventListenerWithSceneGraphPriority(listen,startBtn)
    local listen1 = listen:clone()
    eventDispatcher:addEventListenerWithSceneGraphPriority(listen1,startBtn1)


end
return MainScene