【ulua入门】（2） 动态实例化GameObject，然后更改UGUI元素的值，使用案件移动物体

参考链接 ：  http://www.manew.com/thread-91203-1-1.html

在这里下载ulua ： https://github.com/jarjin/LuaFramework_UGUI

这是第二篇关于ulua的博客，关于基础的部分，请看 第一篇。

首先，我们新建一个 TestComponemt.cs 脚本，使用它来处理跟lua脚本的交互

using UnityEngine;
using System.Collections;
using LuaInterface;
using LuaFramework;
using UnityEngine.UI;

namespace LuaFramework
{
    public class TestComponemt : MonoBehaviour
    {
        public LuaTable table;

         //添加监听
       public static void AddButtonClick(GameObject go, LuaFunction luafunc) 
       {
              if (go == null || luafunc == null) 
                     return;

              Button btn = go.GetComponent ();
              if (btn == null)
                     return;

              btn.onClick.AddListener
              (
                     delegate() 
                     {
                            luafunc.Call(go);
                     }
              );
       }


        public static void Text(GameObject go, string str)
       {
           if (go == null || str == null) return;

           Text txt = go.GetComponent();

           if (txt == null) return;

           txt.text = str;
       }

       //清除监听
       public static void ClearButtonClick(GameObject go) 
       {
              if (go == null) 
                     return;
              Button btn = go.GetComponent ();
              if (btn == null)
                     return;
              btn.onClick.RemoveAllListeners();
              
       }

        public static LuaTable Add(GameObject go, LuaTable tableClass)
       {
           LuaFunction fun = tableClass.GetLuaFunction("New");

           if (fun == null)
               return null;

           object[] rets = fun.Call(tableClass);
           if (rets.Length != 1) return null;

           TestComponemt cmp = go.AddComponent();
           cmp.table = (LuaTable)rets[0];
           cmp.CallAwake();
           return cmp.table;
       }

        public static LuaTable Get(GameObject go, LuaTable table)
        {
            TestComponemt[] cmps = go.GetComponents();
            foreach (TestComponemt item in cmps)
            {
                string mat1 = table.ToString();
                string mat2 = item.table.GetMetaTable().ToString();

                if(mat1 == mat2)
                {
                    return item.table;
                }
            }
            return null;
        }

        void CallAwake()
        {
         
           
            LuaFunction fun = table.GetLuaFunction("Awake");
            if (fun != null)
                fun.Call(table, gameObject);
        }


        void Start()
        {
            LuaFunction fun = table.GetLuaFunction("Start");
            if (fun != null)
                fun.Call(table, gameObject);
        }


        void Update()
        {
            //效率问题有待测试和优化
            //可在lua中调用UpdateBeat替代
            LuaFunction fun = table.GetLuaFunction("Update");
            if (fun != null)
                fun.Call(table, gameObject);
        }

    }
}

里面的AddButtonClick, Text, Add 三个方法，我们会在之后使用。

然后制作如下的简单UI界面和cube

并且把它们放到如图所示的文件夹内，制作成prefab。

然后找到 Packager.cs 脚本，添加如下代码：

然后我们来写 myTestLua.lua 的代码，如下：

 myTestLua = { name = "myTestLua"}

local go
local cube

function myTestLua:Awake()
	print("Awake  + "..self.name)
	LuaHelper = LuaFramework.LuaHelper;
	resMgr = LuaHelper.GetResManager();
	resMgr:LoadPrefab('mytestpanel', {'myTestPanel', 'Cube'}, OnFinishLoad)
	resMgr:LoadPrefab('cube', {'Cube'}, OnCubeLoadFinish)
	print("Awake  + "..self.name)
end

function OnFinishLoad(objs)

	go = UnityEngine.GameObject.Instantiate(objs[0]);
	local parent = UnityEngine.GameObject.Find("Canvas");
	go.transform.parent = parent.transform;
	go.transform.localScale = Vector3.one;
	go.transform.localPosition = Vector3.zero;

	local btn = go.transform:FindChild("Button").gameObject;
	LuaFramework.TestComponemt.AddButtonClick(btn, OnClick);
end

function OnCubeLoadFinish(objs)
	cube = UnityEngine.GameObject.Instantiate(objs[0])
	print("load finish")
	UpdateBeat:Add(Update, cube)
end

function Update()
	local Input = UnityEngine.Input
	local h = Input.GetAxis("Horizontal")
	local v = Input.GetAxis("Vertical")

	local x = cube.transform.position.x + h
	local y = cube.transform.position.y + v
	cube.transform.position = Vector3.New(x, y, 0)
end

function OnClick()
	local text = go.transform:FindChild("Text").gameObject;
	print("can change text?")
	text:GetComponent(typeof(UnityEngine.UI.Text)).text = "Hello, LuaFramework";
	--LuaFramework.TestComponemt.Text(text, "Hello, LuaFramework");
	print("ok?")
end

function myTestLua:Update()

end

function myTestLua:New(obj)
	local o = {}
	setmetatable(o, self)
	self.__index = self
	return o
end

function testPrint()
	print("hello, LuaFramework  "..self.name)
end


return myTestLua

最后，运行程序，点击button按钮，点击WASD键，程序运行正常。

如有不懂，欢迎评论