直接看代码吧，都是很简单的。

C#代码：
LuaTest.cs

using UnityEngine;
using System.Collections;
using SLua;

public class LuaTest : MonoBehaviour
{
    private LuaSvr m_LuaSvr;

    void Start ()
    {
        m_LuaSvr = new LuaSvr();
        m_LuaSvr.init(p =>
        {
            Debug.Log("p = " + p);
        }, 
        () => 
        {
            m_LuaSvr.start("Test");
        });
    }

    void OnGUI()
    {
        if (GUILayout.Button("lua start"))
        {
            if (m_LuaSvr.inited)
            {
                m_LuaSvr.start("Test");
            }
            else
            {
                Debug.Log("LuaSvr not init complete!");
            }
        }
    }

    void Update ()
    {

    }
}

Lua代码：
Test.txt

-- 导入单个类
-- Random = UnityEngine.Random
-- GameObject = UnityEngine.GameObject
-- WaitForSeconds = UnityEngine.WaitForSeconds
-- Yield = UnityEngine.Yield

-- 加此判断后，代码可以重复执行，否则会报错 MonoBehaviour had existed, import can't overload it.
if not MonoBehaviour then
    -- 直接导入UnityEngine
    import"UnityEngine"
end

-- 模拟类实现， 导入
local City = require("City")
local Road = require("Road")

-- slua入口函数
function main()
    -- 变量
    local a = 2
    local b = 2.335
    local c = "ccc"
    local c2 = 'cc2234'
    local d = true
    local e = [===[alo123"]===]

    -- 输出语句
    print("this is Test.txt", a, b, c, c2, d, e, f)
    -- 字符串连接
    print("a = " .. a .. ", b = " .. b)
    
    -- table 类型
    local t = {[1] = 3, ["a"] = 4, [3] = 5}
    print(t[1], t["a"], t[3])
    
    --[[
        块注释
    ]]


    -- 方法调用
    test()
    classTest()
    listTest()
    dictinaryTest()
    unityTest()
end

function test()
    print("test")
    -- if 语句
    local f = 2;
    if f == a then
        print("aaa")
    else
        print("bbb")
    end

    local count = 3
    -- for 语句
    for i = 1, count do
        print("i = ", i)
    end

    -- while 语句
    while count > 0 do
        print("count = ", count)
        count = count - 1
    end

    count = 3
    -- until 语句
    repeat
        print("-- count = ", count)
        count = count - 1
    until count < 0

    print("random = ", random())
    count, a, b, c = random()
    print("count = ", count, "a = ", a, "b = ", b, "c = ", c)
end

function random()
    -- 引用Unity中的Random类
    return Random.Range(0, 100), 2, 3, "addd"
end

function classTest()
    -- local City = require("City")
    -- new City
    local city = City:new(100,200)

    -- 两种方法调用
    print(city:toString()) 
    print(city.toString(city))

    -- local Road = require("Road")
    local road = Road:new()
    road:setPos(3, 3)
    print("road.x = " .. road.x .. ", road.z = " .. road.z)
    print(road:toString())
end

function listTest()
    -- 模拟实现List
    local cityList = {}
    print("len = " .. table.getn(cityList))
    print("len = " .. #cityList)
    
    -- 往List中添加10个Road
    for i=1,10 do
        local r = Road:new()
        r:setPos(i, i)
        -- table.insert使用
        table.insert(cityList, 1, r)
    end

    -- table.remove使用
    table.remove(cityList, 1)

    -- 遍历List输出
    for i=1,#cityList do
        print(cityList[i]:toString())
    end
end

function dictinaryTest()
    local dic = {}

    for i = 1, 10 do
        local r = Road:new()
        r:setPos(i, i)
        dic[i] = r
    end

    table.remove(dic, 3)

    for i = 1, table.getn(dic) do
        print("dic[" .. i .. "] = " .. dic[i]:toString())
    end
end


function unityTest()
    local gameObj = GameObject.Find("Main Camera")
    print("name = " .. gameObj.name)
    -- 创建协程
    local c = coroutine.create(coroutineTest)
    print("coutine.create")
    -- 启动协程
    coroutine.resume(c)
    print("coutine.resume")
end

function coroutineTest()
    local go = GameObject("test")
    go:SetActive(false)
    print("go:SetActive(false)")
    Yield(WaitForSeconds(2))
    go:SetActive(true) 
    print("go:SetActive(true)")
    Yield(WaitForSeconds(2))
    GameObject.Destroy(go)
    print("Destroy(go)")
end

City.txt

local City = {}

--City.__index = City

City.x = 0
City.y = 0

--- 三个横线是文档注释 parameter style1: x,y
-- 
function City:new( ... ) -- ...表示可变参数列表
    -- body
    local args = {...}
    -- table.getn 获取长度
    local argc = table.getn(args) -- argc = #args

    local obj = {}

    --setmetatable(obj,City)

    -- 对City的变量初始化
    for k,v in pairs(City) do
        obj[k] = v
    end

    -- 根据参数进行赋值
    if argc == 2 then
        -- 类型判断
        if type(args[1]) == "number" and type(args[2]) == "number" then
            obj.x = args[1]
            obj.y = args[2]
        end
    end

    return obj
end

function City:toString()
    return self.x .. "," .. self.y
end

return  City

Road.txt

local Road = {}

Road.x = 0
Road.z = 0

function Road:new()
    local obj = {}

    for k,v in pairs(Road) do
        obj[k] = v
    end

    return obj
end

function Road:setPos(x, z)
    self.x = x
    self.z = z
end

function Road:toString()
    return "x = " .. self.x .. ", z = " .. self.z
end

return Road

都是很简单的代码，用来熟悉lua语法。