xLua——Lua函数映射成C#的delegate或interface

作者：追风剑情发布于：2017-7-17 19:44 分类：Lua

以下代码取自xLua demo

using UnityEngine;
using System.Collections;
using XLua;

public class InvokeLua : MonoBehaviour
{
    [CSharpCallLua]
    public interface ICalc
    {
        int Add(int a, int b);
        int Mult { get; set; }
    }

    [CSharpCallLua]
    public delegate ICalc CalcNew(int mult, params string[] args);

    private string script = @"
                local calc_mt = {
                    __index = {
                        Add = function(self, a, b)
                            return (a + b) * self.Mult
                        end
                    }
                }

                Calc = {
	                New = function (mult, ...)
                        print(...)
                        return setmetatable({Mult = mult}, calc_mt)
                    end
                }
	        ";

    void Start()
    {
        LuaEnv luaenv = new LuaEnv();
        Test(luaenv);//调用了带可变参数的delegate，函数结束都不会释放delegate，即使置空并调用GC
        luaenv.Dispose();
    }

    void Test(LuaEnv luaenv)
    {
        luaenv.DoString(script);
        CalcNew calc_new = luaenv.Global.GetInPath<CalcNew>("Calc.New");
        ICalc calc = calc_new(10, "hi", "john"); //constructor
        Debug.Log("sum(*10) =" + calc.Add(1, 2));
        calc.Mult = 100;
        Debug.Log("sum(*100)=" + calc.Add(1, 2));
    }
}

运行测试