cocos2dx2.2.2 自带的extern.lua的一个bug

最近在做核心战斗，大量用到了类，不得不说cocos2dx 2.2.2 自带的类方法真是写的太不好了，有一个很初级的bug，另外缺少超类方法。

初级bug是原作者在new方法里，连：和.都没搞清楚。

重新写了一下该文件：

function super(TmpClass)

return TmpClass.super

end

--Create an class.

function class(classname, super)

local superType = type(super)

local cls

if superType ~= "function" and superType ~= "table" then

superType = nil

super = nil

end

if superType == "function" or (super and super.__ctype == 1) then

-- inherited from native C++ Object

cls = {}

if superType == "table" then

-- copy fields from super

for k,v in pairs(super) do cls[k] = v end

cls.__create = super.__create

cls.super    = super

else

cls.__create = super

end

cls.ctor    = function() end

cls.__cname = classname

cls.__ctype = 1

function cls.new(...)

local instance = cls.__create(...)

-- copy fields from class to native object

for k,v in pairs(cls) do instance[k] = v end

instance.class = cls

instance.ctor(...)

return instance

end

else

-- inherited from Lua Object

if super then

cls = clone(super)

cls.super = super

else

cls = {ctor = function() end}

end

cls.__cname = classname

cls.__ctype = 2 -- lua

cls.__index = cls

function cls.new(...)

local instance = setmetatable({}, cls)

instance.class = cls

instance.ctor(...)

return instance

end

end

return cls

end