tolua注册对象到lua，并在lua中调用的实现

迈不过友情╰ 2022-07-13 05:37 166阅读 0赞

本文基于[tolua里C\#与lua互调][tolua_C_lua]，在此基础上添加了对象的注册。具体看代码：

using System;
    using UnityEngine;
    using UnityEditor;
    using LuaInterface;
    
    public class LuaBehaviour : MonoBehaviour
    {
        public string LuaFullPath;
        public string LuaName;
        private LuaState m_Lua;
    
        private int m_ClassRef = -1;//the lua class ref
        private int m_BindLuaRef = -1;//the lua class bind class ref
        private int m_StartRef = -1;//the 'Start' function of lua
        private int m_OnDestroyRef = -1;// the 'OnDestroy' function of lua
    
        public GameObject tempObj;
    
        public LuaBehaviour()
        {
    
        }
        void Awake()
        {
            m_Lua = LuaInstance.Instance.LuaState;
    
            if (!m_Lua.LuaDoFile(GameConfig.LuaPath + LuaFullPath))
            {
                Debug.LogError("load file failed, file name is " + LuaName);
            }
    
            m_Lua.LuaNewTable();
            m_Lua.LuaPushValue(-1);
            m_BindLuaRef = m_Lua.ToLuaRef();
            m_Lua.LuaRawSetI(LuaIndexes.LUA_REGISTRYINDEX, m_BindLuaRef);
    
            m_Lua.LuaGetGlobal(LuaName);
            m_ClassRef = m_Lua.ToLuaRef();
            if (m_ClassRef == LuaDLL.LUA_REFNIL)
            {
                Debug.LogError("not find the ref object");
            }
            m_Lua.LuaGetGlobal(LuaName);
            m_Lua.LuaRawSetI(LuaIndexes.LUA_REGISTRYINDEX, m_ClassRef);
    
            m_Lua.LuaRawGetI(LuaIndexes.LUA_REGISTRYINDEX, m_ClassRef);
            m_Lua.LuaRawGetI(LuaIndexes.LUA_REGISTRYINDEX, m_BindLuaRef);
            m_Lua.LuaSetMetaTable(-2);
    
            m_Lua.LuaGetGlobal(LuaName);
    
            m_Lua.LuaGetField(-1, "Start");
            m_StartRef = m_Lua.ToLuaRef();
            if (m_StartRef == LuaDLL.LUA_REFNIL)
            {
                Debug.LogError("not find the ref object");
            }
            m_Lua.LuaGetField(-1, "Start");
            m_Lua.LuaRawSetI(LuaIndexes.LUA_REGISTRYINDEX, m_StartRef);
    
            m_Lua.LuaGetField(-1, "OnDestroy");
            m_OnDestroyRef = m_Lua.ToLuaRef();
            if (m_OnDestroyRef == LuaDLL.LUA_REFNIL)
            {
                Debug.LogError("not find the ref object");
            }
            m_Lua.LuaGetField(-1, "OnDestroy");
            m_Lua.LuaRawSetI(LuaIndexes.LUA_REGISTRYINDEX, m_OnDestroyRef);
            RegisterParams();
        }
    
        void Start()
        {
            m_Lua.LuaRawGetI(LuaIndexes.LUA_REGISTRYINDEX, m_StartRef);
            m_Lua.LuaRawGetI(LuaIndexes.LUA_REGISTRYINDEX, m_ClassRef);
            m_Lua.PCall(1, 0);
            m_Lua.LuaPop(1);
        }
    
        void OnDestroy()
        {
            m_Lua.LuaRawGetI(LuaIndexes.LUA_REGISTRYINDEX, m_OnDestroyRef);
            m_Lua.PCall(0, 0);
            m_Lua.LuaPop(1);
        }
    
        private void RegisterParams()
        {
            m_Lua.LuaRawGetI(LuaIndexes.LUA_REGISTRYINDEX, m_ClassRef);
            m_Lua.PushObject(tempObj);
            m_Lua.LuaSetField(-2, "tempObj");
        }
    }

在上一篇的基础上，我添加了一个LuaInstance类用于管理LuaState的使用，使用RegisterParam方法将C\#中的对象注册到lua，并在lua中调用。本功能主要是解决NGUI对象的动态添加问题，比方，以后游戏上线后，可能会在预制体中添加个label，但是我们不能更新C\#，所以只能通过动态注册到lua中。

lua中的使用

--Created By: xikuo yu
    --Time: 2016-12-24
    
    FirstLua = {}
    setmetatable(FirstLua,{})
    function FirstLua:Start()
    	print("FirstLua Start")
    	if self.tempObj ~= nil then
    		print("tempObj is not nil")
    		print( self.tempObj.tag )
    		self.tempObj:SetActive(false);
    
    	else
    		print("tempObj is nil")
    	end
    end
    
    function FirstLua:OnDestroy()
    	print("FirstLua OnDestroy")
    end
    
    function FirstLua.Function1()
    	if self == nil then
    		print("FirstLua Function1 self is nil")
    	else
    		print("FirstLua Function1")
    	end
    end
    
    function Function2()
    	print("Function2")
    end

关于调用：

tolua为我们将类的属性添加了get与set，在lua中使用时，通过点操作符，获取C\#注册过来的对象，使用分号操作符，获取C\#中Wraper文件中注册的方法。

以后可能打算用反射的方式来添加方法的注册，使热更新做的更彻底，缺点是性能会有损失。

结果：

![SouthEast][]

[tolua_C_lua]: http://blog.csdn.net/yuxikuo_1/article/details/53865406
[SouthEast]: /images/20220713/a828d95cb3984699bafab88f83f91847.png