记录好每次打包的文件MD5和版本信息后，我们需要根据这些信息判断出哪些文件需要热更，从而打出热更补丁。在这里我们需要制作一个编辑器窗口，方便指定热更的目标平台和版本号。

热更包打包窗口

在ResFrame——Editor文件夹内新建WindowsFile脚本，这是一个调用Windows系统文件管理器的脚本。

WindowsFile

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using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential,CharSet = CharSet.Auto)]
public class OpenFileName 
{
    public int structSize = 0;
    public IntPtr dlgOwner = IntPtr.Zero;
    public IntPtr instance = IntPtr.Zero;
    public String filter = null;
    public String customFilter = null;
    public int maxCustFilter = 0;
    public int filterIndex = 0;
    public String file = null;
    public int maxFile = 0;
    public String fileTitle = null;
    public int maxFileTitle = 0;
    public String initialDir = null;
    public String title = null;
    public int flags = 0;
    public short fileOffset = 0;
    public short fileExtension = 0;
    public String defExt = null;
    public IntPtr custData = IntPtr.Zero;
    public IntPtr hook = IntPtr.Zero;
    public String templateName = null;
    public IntPtr reservedPtr = IntPtr.Zero;
    public int reservedInt = 0;
    public int flagsEx = 0;
}
public class LocalDialog
{
    //链接指定系统函数  打开文件对话框
    [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
    public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
    public static bool GetOFN([In, Out] OpenFileName ofn)
    {
        return GetOpenFileName(ofn);
    }

    //链接指定系统函数  另存为对话框
    [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
    public static extern bool GetSaveFileName([In, Out] OpenFileName ofn);
    public static bool GetSFN([In, Out] OpenFileName ofn)
    {
        return GetSaveFileName(ofn);
    }
}

在ResFrame——Editor——Resource文件夹内新建BundleHotFix脚本。

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using UnityEngine;
using UnityEditor;
using System.Runtime.InteropServices;

public class BundleHotFix : EditorWindow
{
    [MenuItem("Tools/打包热更包")]
    static void Init()
    {
        BundleHotFix window = EditorWindow.GetWindow<BundleHotFix>(false,"热更包界面",true);
        window.Show();
    }
    string md5Path = "";
    string hotCount = "1";
    OpenFileName m_OpenFileName = null;
    private void OnGUI()
    {
        GUILayout.BeginHorizontal();
        md5Path = EditorGUILayout.TextField("ABMD5路径", md5Path, GUILayout.Width(350), GUILayout.Height(20));
        if (GUILayout.Button("选择版本ABMD5文件", GUILayout.Width(150), GUILayout.Height(30)))
        {
            m_OpenFileName = new OpenFileName();
            m_OpenFileName.structSize = Marshal.SizeOf(m_OpenFileName);
            m_OpenFileName.filter = "ABMD5文件(*.bytes)\0*.bytes";//'\0'表示字符串的结尾
            m_OpenFileName.file = new string(new char[256]);
            m_OpenFileName.maxFile = m_OpenFileName.file.Length;
            m_OpenFileName.fileTitle = new string(new char[64]);
            m_OpenFileName.maxFileTitle = m_OpenFileName.fileTitle.Length;
            m_OpenFileName.initialDir = (Application.dataPath + "/../Version").Replace("/", "\\");//默认路径
            m_OpenFileName.title = "选择MD5窗口";
            m_OpenFileName.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000008;
            if (LocalDialog.GetSaveFileName(m_OpenFileName))
            {
                Debug.Log(m_OpenFileName.file);
                md5Path = m_OpenFileName.file;
            }
        }
        GUILayout.EndHorizontal();

        GUILayout.BeginHorizontal();
        hotCount = EditorGUILayout.TextField("热更补丁版本：", hotCount, GUILayout.Width(350), GUILayout.Height(20));
        GUILayout.EndHorizontal();

        if (GUILayout.Button("开始打热更包", GUILayout.Width(100), GUILayout.Height(50)))
        {
            if(!string.IsNullOrEmpty(md5Path) && md5Path.EndsWith(".bytes"))
            {
                BundleEditor.Build(true, md5Path, hotCount);
            }
        }
    }
}