oop3

Author: Tinywan

Lua-Script/oop/account/account.lua

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+--
+-- Created by IntelliJ IDEA.
+-- User: Administrator
+-- Date: 2017/6/6
+-- Time: 17:14
+-- To change this template use File | Settings | File Templates.
+--
+local _M = {}
+
+local mt = { __index = _M }
+
+function _M.deposit (self, v)
+    self.balance = self.balance + v
+end
+
+function _M.withdraw (self, v)
+    if self.balance > v then
+        self.balance = self.balance - v
+    else
+        error("insufficient funds")
+    end
+end
+
+function _M.new (self, balance)
+    balance = balance or 0
+    return setmetatable({balance = balance}, mt)
+end
+

Lua-Script/oop/class01.lua

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+--
+local Sharp = { _val = 1 }       --①  父类
+
+function Sharp:new()
+    local new_sharp = {}
+    self.__index = self          --②，self == Sharp Sharp.__index = Sharp 等价于 Sharp.__index = function(key) return Sharp[key] end
+    setmetatable(new_sharp, self)
+    return new_sharp
+end
+
+-- define fun1
+function Sharp:sharp_func()
+    print("Sharp call sharp_func")
+end
+
+-- define fun2
+function Sharp:name()
+    print("Sharp call name")
+end
+
+-- define fun3
+function Sharp:val()
+    print(string.format("Sharp call val %d", self._val))
+end
+
+local sharp = Sharp:new()
+sharp:sharp_func()
+sharp:name()
+sharp:val()

Lua-Script/oop/class03.lua

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+-- 类的继承
+local Sharp = { _val = 1 } --①  父类
+
+function Sharp:new()
+    local new_sharp = {}
+    self.__index = self --②，self == Sharp Sharp.__index = Sharp 等价于 Sharp.__index = function(key) return Sharp[key] end
+    setmetatable(new_sharp, self)
+    return new_sharp
+end
+
+-- define fun1
+function Sharp:sharp_func()
+    print("Sharp call sharp_func")
+end
+
+-- define fun2
+function Sharp:name()
+    print("Sharp call name")
+end
+
+-- define fun3
+function Sharp:val()
+    print(string.format("Sharp call val %d", self._val))
+end
+
+Circle = Sharp:new() --① 子类
+function Circle:new()
+    local new_circle = {}
+    self.__index = self --②，self == Circle
+    setmetatable(new_circle, self) --③
+
+    return new_circle
+end
+
+--新函数
+function Circle:circle_func()
+    print("Circle call circle_func")
+end
+
+--覆盖函数name
+function Circle:name()
+    print("Circle call name")
+end
+
+--覆盖函数val
+function Circle:val()
+    print(string.format("Circle call val %d", self._val))
+end
+
+--输出结果
+--Sharp call sharp_func
+--Circle call circle_func
+--Circle call name
+--Circle call val 2
+
+--调用父类被子类覆盖了的name方法
+function Circle:sharp_name()
+    local circle_metatable = getmetatable(self)
+--    local sharp_metatable = getmetatable(circle_metatable)
+--    sharp_metatable["name"]()
+    print(circle_metatable)
+end
+
+local circle1 = Circle:new()
+circle1.name()
+circle1.sharp_name()
+-- circle._val = 2         --覆盖赋值
+-- circle:sharp_func()     --调用父类函数
+-- circle:circle_func()    --调用新函数
+-- circle:name()           --调用覆盖函数
+-- circle:val()            --调用覆盖函数

Lua-Script/oop/self_class01.lua

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+--
+-- Created by IntelliJ IDEA.
+-- User: Administrator
+-- Date: 2017/6/6
+-- Time: 9:47
+-- To change this template use File | Settings | File Templates.
+-- 自己尝试着写一个类哦
+
+--
+local ok, new_tab = pcall(require, "table.new")
+if not ok or type(new_tab) ~= "function" then
+    new_tab = function (narr, nrec) return {} end
+end
+
+local _M = new_tab(0, 54)       --①  父类
+
+_M._VERSION = '0.01'
+
+function _M:new()
+    local new_obj = {}
+    self.__index = self          --②，self == _M
+    setmetatable(new_obj, self)
+    return new_obj
+end
+
+-- 定义个简单的方法
+function _M:func()
+    print("Function func ")
+end
+
+return _M
+

Lua-Script/oop/self_class02.lua

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+--
+-- Created by IntelliJ IDEA.
+-- User: Administrator
+-- Date: 2017/6/6
+-- Time: 9:49
+-- To change this template use File | Settings | File Templates.
+--
+local class01 = require "self_class01"
+print("_VERSION == "..class01._VERSION)
+local func = class01:func()
+print(func)
+