背景： Hero 是继承别的类的
--self.Hero_ = Hero:new()
--self.Hero_.create(self,"zhazha",100,50,1000,1000,50,50,"images/man.png")
function MainScene:onEnter()
self.Hero_.onAtk(self,1,2) --这是对的
self:schedule(function()
self.Hero_.onAtk(self,1,2) --放到这里面就报错 attempt to call field 'onAtk' (a nil value
end