Unity3D使用XLua实现简单热更新

Zephus · 发表于 2023-2-28 17:27

使用XLua热更新

简单的XLua热更Demo 1.首先第一步，是下载xlua插件，可以直接在GitHub下载：xlua插件地址 2.按照热更新设置：在Project Setting 的Player的Scripting Define Symbols添加HOTFIX_ENABLE，这样在编辑器上会看到XLua，然后有Generate Code和HotFix Inject In Editor，在C#脚本有改动的时候就要Generate Code一下（会提示finish） 3.要热更的地方需要标识[Hotfix]特性，在类声明的位置标识的时候在打包的时候会热更不成功，解决方案：
public static class HotFixConfig
{
[Hotfix]
public static List<Type> by_field = new List<Type>()
{
      typeof(Load),
      typeof(Cube)
};
}
4.要执行lua，开启一个lua虚拟机
private void Awake()
{
      luaEnv = new LuaEnv();
      luaEnv.AddLoader(MyLoader);
      luaEnv.DoString(&#34;require &#39;Test&#39;&#34;);
}
private byte[] MyLoader(ref string filePath)
{
      string absPath = @&#34;E:\Unity3d\HotFix\XluaTest\&#34; + filePath + &#34;.lua.txt&#34;;
      return  System.Text.Encoding.UTF8.GetBytes(File.ReadAllText(absPath));
}
5.lua那边要调用的C#函数要标识为[LuaCallCSharp] 这里只实现了简单的下载单个资源，具体需要再去细写
[LuaCallCSharp]
public void LoadResource(string resName,string filePath)
{
      StartCoroutine(Load(resName, filePath));
}

IEnumerator Load(string resName,string filePath)
{
      AssetBundle assetBundle=null;
      if (!bundleDic.ContainsKey(filePath))
      {
         UnityWebRequest request = UnityWebRequestAssetBundle.GetAssetBundle(@&#34;path&#34; + filePath);
         yield return request.SendWebRequest();
         Debug.Log(request);
         bundleDic.Add(filePath, DownloadHandlerAssetBundle.GetContent(request));
      }
      yield return bundleDic[filePath];
      assetBundle = bundleDic[filePath];
      //.downloadHandler as DownloadHandlerAssetBundle).assetBundle;
      Debug.Log(assetBundle);
      //WWW wWW = new WWW(@&#34;path&#34; + filePath);
      //yield return wWW;
      //AssetBundle assetBundle = wWW.assetBundle;
      //Debug.Log(assetBundle);
      GameObject obj = assetBundle.LoadAsset<GameObject>(resName);

      if (!objDic.ContainsKey(resName))
      {
         objDic.Add(resName, obj);
      }
}

[LuaCallCSharp]
public GameObject GetPrefab(string resName)
{
      return objDic[resName];
}
这里打包AssetBundle用的是官方的插件，也是可以在GitHub下载的：AssetBundle插件地址附：导入方式：Window-》Package Manager-》右上角的加号-》选择第一个（Add package from disk）->找到下载的这个文件的package.json文件
6.开启了lua虚拟机，当然也要销毁
private void OnDestroy()
{
      luaEnv.Dispose();
}
7.
private void OnDisable()
{
   luaEnv.DoString(&#34;require &#39;LuaDispose&#39;&#34;);
}
//LuaDispose.lua.txt内容
xlua.hotfix(CS.Cube,&#34;Update&#34;,nil)
xlua.hotfix(CS.Load,&#34;Start&#34;,nil)
xlua.hotfix(CS.Load,&#34;Update&#34;,nil)
8.其他脚本
public class Load : MonoBehaviour
{
public HotFixScript hotFix;

private void Awake()
{
      if (!hotFix)
      {
         hotFix = GetComponent<HotFixScript>();
      }
}
[LuaCallCSharp]
public void Start()
{

}

[LuaCallCSharp]
public void Update()
{

}
}

public class Cube : MonoBehaviour
{
public Rigidbody rigidbody1;
// Start is called before the first frame update
void Start()
{
      rigidbody1 = gameObject.GetComponent<Rigidbody>();
}

[LuaCallCSharp]
// Update is called once per frame
public void Update()
{
      if (Input.GetKeyDown(KeyCode.W))
      {
         rigidbody1.AddForce(Vector3.up*300);
      }
}
}
9.lua热更内容
local UnityEngine=CS.UnityEngine

xlua.hotfix(CS.Cube,&#39;Update&#39;,function (self)
if(UnityEngine.Input.GetKeyDown(UnityEngine.KeyCode.G))  then
      self.rigidbody1:AddForce(UnityEngine.Vector3.up*300)
end
end)

xlua.hotfix(CS.Load,&#39;Start&#39;,function (self)
self.hotFix:LoadResource(&#39;Sphere&#39;,&#39;gameobject.unity3d&#39;)
end)

xlua.hotfix(CS.Load,&#39;Update&#39;,function(self)
if(UnityEngine.Input.GetKeyDown(UnityEngine.KeyCode.T))  then
   local obj= UnityEngine.GameObject.Instantiate(self.hotFix:GetPrefab(&#39;Sphere&#39;))
   obj.transform.position=UnityEngine.Vector3.right
end
end)10.在Loading场景加载那两个lua文件
public class LoadScene : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{
      StartCoroutine(LoadLuaTxt());
}

IEnumerator LoadLuaTxt()
{
      UnityWebRequest request = UnityWebRequest.Get(@&#34;path/Test.lua.txt&#34;);
      yield return request.SendWebRequest();
      string str = request.downloadHandler.text;
      File.WriteAllText(@&#34;E:\Unity3d\HotFix\XluaTest\&#34;+&#34;Test.lua.txt&#34;,str);
      UnityWebRequest request1 = UnityWebRequest.Get(@&#34;path/LuaDispose.lua.txt&#34;);
      yield return request1.SendWebRequest();
      string str1 = request1.downloadHandler.text;
      File.WriteAllText(@&#34;E:\Unity3d\HotFix\XluaTest\&#34; + &#34;LuaDispose.lua.txt&#34;, str1);
      SceneManager.LoadSceneAsync(&#34;SampleScene&#34;);
}

}
附：path都是指的服务器地址，之前有需求用了腾讯云的对象存储，所以博主这里都是放在腾讯云里的
11.其他：从服务器下载图片资源方法
IEnumerator LoadImage()
{
      UnityWebRequest request = UnityWebRequestTexture.GetTexture(@&#34;path/AssetBundles/PC/1.jpg&#34; );
      yield return request.SendWebRequest();
      if (request.error != null)
      {
         Debug.Log(request.error);
      }
      Texture2D texture2D = DownloadHandlerTexture.GetContent(request);
      image.sprite = Sprite.Create(texture2D, new Rect(0,0,texture2D.width,texture2D.height),Vector2.zero);
}

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