local Snake = require "app.Snake"

local MainScene = class("MainScene", function()

    return display.newScene("MainScene")

end)

local cMoveSpeed = 0.3

function MainScene:onEnter()

    self.snake = Snake.new(self)

local tick = function()

  self.snake:Update()

end

cc.Director:getInstance():getScheduler():scheduleScriptFunc(tick,cMoveSpeed,false)

end

function MainScene:onExit()

end

return MainScene

***********************************************************************************

一直报self.snake = Snake.new(self)有错

错误信息是attempt to index upvalue "Snake"(a boolean value)