[Unity][ILRuntime][C#]從零開始接入熱更新-有解無憂

直接從參考資料3，三、創建自己的Hotfix工程開始

unity2019.4.19f1c1

新建一個空專案叫test2

在Unity專案test2里新建一個空的腳本HelloWorld

用Visual Studio打開HelloWorld.cs

檔案-新建-專案

搜索類別庫

熱更新專案位置與新建的Unity專案test2路徑一致

熱更新專案名稱 HotFix_Project

用VS打開

E:\ui\chatprojects\test1\test2\HotFix_Project

HotFix_Project.sln

C:\Program Files\Unity\Hub\Editor\2019.4.19f1c1\Editor\Data\Managed

unity版本安裝路徑

Managed\UnityEngine里面的所有.dll檔案

然后添加參考這兩個檔案

E:\ui\chatprojects\test1\test2\Library\ScriptAssemblies

Unity專案test2專案檔案\Library\ScriptAssemblies

Assembly-CSharp.dll

UnityEngine.UI.dll

設定HotFix_Project.sln生成后的檔案路徑

E:\ui\chatprojects\test1\test2\Assets\StreamingAssets

Unity專案test2工程檔案內的StreamingAssets檔案夾，如果沒有就新建一個，

Class1.cs的類名可以改可以不改，不影響運行，

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
namespace HotFix_Project
{
    public class Main
    {
        public void test(){

            Debug.Log("Hello world");
        }
    }
}

熱更新專案就會生成 3個檔案在

E:\ui\chatprojects\test1\test2\Assets\StreamingAssets

HotFix_Project.dll

HotFix_Project.pdb

HotFix_Project.dll.mdb

在Unity專案test2中添加插件ILRuntime

PackageManager-ILRuntime-Instan

在Unity專案中新建一個空物體，掛載HelloWorld組件，點擊運行，

HelloWorld.cs

using ILRuntime.Runtime.Enviorment;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;

public class HelloWorld : MonoBehaviour
{
    AppDomain appdomain;
    System.IO.MemoryStream fs;
    System.IO.MemoryStream p;
    // Start is called before the first frame update
    void Start()
    {
        Debug.Log("Start");
        StartCoroutine(LoadHotFixAssembly());
    }

    IEnumerator LoadHotFixAssembly()
    {
        appdomain = new ILRuntime.Runtime.Enviorment.AppDomain();
        string path = "file://" + Application.streamingAssetsPath + "/HotFix_Project.dll";//***注意熱更新檔案的路徑

        string path2 = "file:///" + Application.streamingAssetsPath + "/HotFix_Project.pdb";//***注意熱更新檔案的路徑
        Debug.Log("path = " + path);
        UnityWebRequest www = UnityWebRequest.Get(path);
        www.SendWebRequest();

        while (!www.isDone)//是否讀取完資料
        {
            yield return null;

        }
        byte[] dll = www.downloadHandler.data;

        fs = new MemoryStream(dll);

        UnityWebRequest www2 = UnityWebRequest.Get(path2);
        www2.SendWebRequest();


        while (!www2.isDone)//是否讀取完資料
        {
            yield return null;

        }
        byte[] pdb = www2.downloadHandler.data;
        p = new MemoryStream(pdb);

        try
        {
            appdomain.LoadAssembly(fs, p, new ILRuntime.Mono.Cecil.Pdb.PdbReaderProvider());
        }
        catch
        {
            Debug.LogError("加載熱更DLL失敗，請確保已經通過VS打開Assets/Samples/ILRuntime/1.6/Demo/HotFix_Project/HotFix_Project.sln編譯過熱更DLL");
        }
        OnHotFixLoaded();
    }

    void OnHotFixLoaded()
    {
        object obj = appdomain.Instantiate("HotFix_Project.Main");//***注意，熱更新專案名稱.類名
        appdomain.Invoke("HotFix_Project.Main", "test", obj);//***注意，熱更新專案名稱.類名,這里的test為函式名
    }
    private void OnDestroy()
    {
        if (fs != null)
            fs.Close();
        if (p != null)
            p.Close();
        fs = null;
        p = null;
    }
}

上面配置完成后，場景點擊運行，

Unity 專案呼叫了熱更新ILRuntime里面的代碼，