7.Unity进阶Timeline总结

2.ILRuntimeManager逻辑处理

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2.1 知识点

重新生成热更工程

重新生成热更工程，因为热更工程是要放到ab包中，所以把后缀改成txt，这样ab包才能识别，把它放到AB包中。

重写ILRuntimeManager

主要修改的地方是从AB中加载dll和pdb文件。

/// <summary>
/// 启动 ILRuntime：从 AB 异步拉取 DLL、PDB，转 MemoryStream 后 LoadAssembly
/// </summary>
public void StartILRuntime(UnityAction callBack, UnityAction<string> infoCallBack)
{
    if (!isStart)
    {
        isStart = true;
        appDomain = new AppDomain(ILRuntimeJITFlags.JITOnDemand);
        infoCallBack?.Invoke("开始更新 dll 文件");
        AssetBundleManager.Instance.LoadAssetBundleResourceAsync<TextAsset>("dll_res", "HotFix_Project.dll",
            (dll) =>
            {
                infoCallBack?.Invoke("开始更新 pdb 文件");
                AssetBundleManager.Instance.LoadAssetBundleResourceAsync<TextAsset>("dll_res", "HotFix_Project.pdb",
                    (pdb) =>
                    {
                        dllStream = new MemoryStream(dll.bytes);
                        pdbStream = new MemoryStream(pdb.bytes);
                        appDomain.LoadAssembly(dllStream, pdbStream, new PdbReaderProvider());

                        infoCallBack?.Invoke("开始初始化 ILRuntime");
                        InitILRuntime();

                        if (isDebug)
                        {
                            infoCallBack?.Invoke("开始等待调试器接入");
                            StartCoroutine(WaitDebugger(callBack));
                        }
                        else
                        {
                            infoCallBack?.Invoke("开始执行回调");
                            callBack?.Invoke();
                        }
                    });
            });
    }
}

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2.2 知识点代码

using ILRuntime.Mono.Cecil.Pdb;
using ILRuntime.Runtime;
using ILRuntime.Runtime.Enviorment;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using BaseFramework;
using UnityEngine;
using UnityEngine.Events;

public class ILRuntimeManager : BaseSingletonInMonoBehaviour<ILRuntimeManager>
{
    public AppDomain appDomain;

    //dll文件和pdb文件的流对象
    private MemoryStream dllStream;
    private MemoryStream pdbStream;

    //是否已经加载了对应的文件
    private bool isStart = false;

    //是否是调试模式
    private bool isDebug = false;

    /// <summary>
    /// 启动 ILRuntime，从 AB 异步加载 dll、pdb 并完成初始化
    /// </summary>
    public void StartILRuntime(UnityAction callBack, UnityAction<string> infoCallBack)
    {
        if (!isStart)
        {
            isStart = true;
            appDomain = new AppDomain(ILRuntimeJITFlags.JITOnDemand);
            infoCallBack?.Invoke("开始更新 dll 文件");
            AssetBundleManager.Instance.LoadAssetBundleResourceAsync<TextAsset>("dll_res", "HotFix_Project.dll",
                (dll) =>
                {
                    infoCallBack?.Invoke("开始更新 pdb 文件");
                    AssetBundleManager.Instance.LoadAssetBundleResourceAsync<TextAsset>("dll_res", "HotFix_Project.pdb",
                        (pdb) =>
                        {
                            dllStream = new MemoryStream(dll.bytes);
                            pdbStream = new MemoryStream(pdb.bytes);
                            appDomain.LoadAssembly(dllStream, pdbStream, new PdbReaderProvider());

                            infoCallBack?.Invoke("开始初始化 ILRuntime");
                            InitILRuntime();

                            if (isDebug)
                            {
                                infoCallBack?.Invoke("开始等待调试器接入");
                                StartCoroutine(WaitDebugger(callBack));
                            }
                            else
                            {
                                infoCallBack?.Invoke("开始执行回调");
                                callBack?.Invoke();
                            }
                        });
                });
        }
    }

    private void InitILRuntime()
    {
        //如果想使用Unity自带的性能调试窗口 调试ILRuntime相关内容 就需要加入该行代码
        appDomain.UnityMainThreadID = Thread.CurrentThread.ManagedThreadId;
    }

    IEnumerator WaitDebugger(UnityAction callBack)
    {
        while (!appDomain.DebugService.IsDebuggerAttached)
            yield return null;

        yield return new WaitForSeconds(1f);

        callBack?.Invoke();
    }

    /// <summary>
    /// 停止 ILRuntime，关闭流并卸载
    /// </summary>
    public void StopILRuntime()
    {
        if (dllStream != null)
            dllStream.Close();
        if (pdbStream != null)
            pdbStream.Close();

        dllStream = null;
        pdbStream = null;

        appDomain = null;

        isStart = false;
    }
}

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