tolua框架里，如何在C#脚本中调用Lua脚本的函数？

在untiy工程里搭建了tolua框架，不过还是个小白，只知道lua中调用C#脚本类可以通过反射完成，现在需要在C#脚本中调用Lua脚本类的函数，请问该如何完成？

1.LuaState.GetFunction：获取Lua方法
2.LuaState.GetFunction.Call()：调用Lua函数

https://www.cnblogs.com/shirln/p/7795332.html
https://blog.csdn.net/sibaison/article/details/69927897

using UnityEngine;
using System.Collections;
using LuaInterface;
using System;

public class CallLuaFunction : MonoBehaviour
{
private string script =
@" function luaFunc(num)

return num + 1
end

        test = {}
        test.luaFunc = luaFunc
    ";

LuaFunction luaFunc = null;
LuaState lua = null;
string tips = null;

void Start () 
{

#if UNITY_5 || UNITY_2017 || UNITY_2018
Application.logMessageReceived += ShowTips;
#else
Application.RegisterLogCallback(ShowTips);
#endif
new LuaResLoader();
lua = new LuaState();
lua.Start();
DelegateFactory.Init();

lua.DoString(script);

    //Get the function object
    luaFunc = lua.GetFunction("test.luaFunc");

    if (luaFunc != null)
    {
        int num = luaFunc.Invoke<int, int>(123456);
        Debugger.Log("generic call return: {0}", num);

        num = CallFunc();
        Debugger.Log("expansion call return: {0}", num);

        Func<int, int> Func = luaFunc.ToDelegate<Func<int, int>>();
        num = Func(123456);
        Debugger.Log("Delegate call return: {0}", num);

        num = lua.Invoke<int, int>("test.luaFunc", 123456, true);
        Debugger.Log("luastate call return: {0}", num);
    }

    lua.CheckTop();
}

void ShowTips(string msg, string stackTrace, LogType type)
{
    tips += msg;
    tips += "\r\n";
}

#if !TEST_GC
void OnGUI()
{
GUI.Label(new Rect(Screen.width / 2 - 200, Screen.height / 2 - 150, 400, 300), tips);
}
#endif

void OnDestroy()
{
    if (luaFunc != null)
    {
        luaFunc.Dispose();
        luaFunc = null;
    }

    lua.Dispose();
    lua = null;

#if UNITY_5 || UNITY_2017 || UNITY_2018
Application.logMessageReceived -= ShowTips;
#else
Application.RegisterLogCallback(null);
#endif
}

int CallFunc()
{        
    luaFunc.BeginPCall();                
    luaFunc.Push(123456);
    luaFunc.PCall();        
    int num = (int)luaFunc.CheckNumber();
    luaFunc.EndPCall();
    return num;                
}

}