使用XLua实现简单热更新

APSchmidt · 发表于 2023-4-9 11:27

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：

publicstaticclassHotFixConfig{[Hotfix]publicstaticList<Type> by_field =newList<Type>(){typeof(Load),typeof(Cube)};}

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4.要执行lua，开启一个lua虚拟机

privatevoidAwake(){
luaEnv =newLuaEnv();
luaEnv.AddLoader(MyLoader);
luaEnv.DoString("require 'Test'");}privatebyte[]MyLoader(refstring filePath){string absPath =@"E:\Unity3d\HotFix\XluaTest" + filePath + ".lua.txt";return System.Text.Encoding.UTF8.GetBytes(File.ReadAllText(absPath));}

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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]publicvoidLoadResource(string resName,string filePath){StartCoroutine(Load(resName, filePath));}IEnumeratorLoad(string resName,string filePath){AssetBundle assetBundle=null;if(!bundleDic.ContainsKey(filePath)){UnityWebRequest request = UnityWebRequestAssetBundle.GetAssetBundle(@"path"+ filePath);yieldreturn request.SendWebRequest();
Debug.Log(request);
bundleDic.Add(filePath, DownloadHandlerAssetBundle.GetContent(request));}yieldreturn bundleDic[filePath];
assetBundle = bundleDic[filePath];//.downloadHandler as DownloadHandlerAssetBundle).assetBundle;
Debug.Log(assetBundle);//WWW wWW = new WWW(@"path" + 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]publicGameObjectGetPrefab(string resName){return objDic[resName];}

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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

privatevoidOnDestroy(){
luaEnv.Dispose();}

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privatevoidOnDisable(){
luaEnv.DoString("require 'LuaDispose'");}//LuaDispose.lua.txt内容
xlua.hotfix(CS.Cube,"Update",nil)
xlua.hotfix(CS.Load,"Start",nil)
xlua.hotfix(CS.Load,"Update",nil)

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8.其他脚本

publicclassLoad:MonoBehaviour{publicHotFixScript hotFix;privatevoidAwake(){if(!hotFix){
hotFix =GetComponent<HotFixScript>();}}[LuaCallCSharp]publicvoidStart(){}[LuaCallCSharp]publicvoidUpdate(){}}publicclassCube:MonoBehaviour{publicRigidbody rigidbody1;// Start is called before the first frame updatevoidStart(){
rigidbody1 = gameObject.GetComponent<Rigidbody>();}[LuaCallCSharp]// Update is called once per framepublicvoidUpdate(){if(Input.GetKeyDown(KeyCode.W)){
rigidbody1.AddForce(Vector3.up*300);}}}

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9.lua热更内容

local UnityEngine=CS.UnityEngine
xlua.hotfix(CS.Cube,'Update',function(self)if(UnityEngine.Input.GetKeyDown(UnityEngine.KeyCode.G))then
self.rigidbody1:AddForce(UnityEngine.Vector3.up*300)endend)
xlua.hotfix(CS.Load,'Start',function(self)
self.hotFix:LoadResource('Sphere','gameobject.unity3d')end)
xlua.hotfix(CS.Load,'Update',function(self)if(UnityEngine.Input.GetKeyDown(UnityEngine.KeyCode.T))thenlocal obj= UnityEngine.GameObject.Instantiate(self.hotFix:GetPrefab('Sphere'))
obj.transform.position=UnityEngine.Vector3.right
endend)

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10.在Loading场景加载那两个lua文件

publicclassLoadScene:MonoBehaviour{// Start is called before the first frame updatevoidStart(){StartCoroutine(LoadLuaTxt());}IEnumeratorLoadLuaTxt(){UnityWebRequest request = UnityWebRequest.Get(@"path/Test.lua.txt");yieldreturn request.SendWebRequest();string str = request.downloadHandler.text;
File.WriteAllText(@"E:\Unity3d\HotFix\XluaTest"+"Test.lua.txt",str);UnityWebRequest request1 = UnityWebRequest.Get(@"path/LuaDispose.lua.txt");yieldreturn request1.SendWebRequest();string str1 = request1.downloadHandler.text;
File.WriteAllText(@"E:\Unity3d\HotFix\XluaTest" + "LuaDispose.lua.txt", str1);
SceneManager.LoadSceneAsync("SampleScene");}}

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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

IEnumeratorLoadImage(){UnityWebRequest request = UnityWebRequestTexture.GetTexture(@"path/AssetBundles/PC/1.jpg");yieldreturn request.SendWebRequest();if(request.error !=null){
Debug.Log(request.error);}Texture2D texture2D = DownloadHandlerTexture.GetContent(request);
image.sprite = Sprite.Create(texture2D,newRect(0,0,texture2D.width,texture2D.height),Vector2.zero);}

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