cocos2d-lua .csb file animation playback

local root = cc.CSLoader:createNode("SecondLayer.csb")

    layer:addChild(root)

    

    self.sprite2 = root:getChildByName("Sprite_2")

   

    local timeline = cc.CSLoader:createTimeline("SecondLayer.csb");

    layer:runAction(timeline);

 

    timeline:setFrameEventCallFunc(function(dt)

        print (dt:getEvent()) -- frame event

    end)

    

    local startBtn = root:getChildByName("Button_1")

    local function startAction(sender,eventType)

        if eventType == 2 then

            if sender:getTitleText() == "开始" then

                sender:setTitleText("Pause")

                timeline:gotoFrameAndPlay(0,true);

            else 

                sender:setTitleText("start")

                timeline:gotoFrameAndPlay(5,false);

            end

        end

            

        print(eventType)

    end

    startBtn: addTouchEventListener (startAction)