新的家园

在前一篇Unity开发源码的加解密 涉及的内容比较多，最终得到了加密后的Assembly-CSharp.dll和解密libmono.so。如何能在打包的时候自动处理呢？下面介绍一种方式。 [PostProcessBuild]标签：Add this attribute to a method to get a notification just after building the player. 作用就是获取打包后通知，执行添加后的方法. 处理函数如下：

\[PostProcessBuild\]
public static void OnPostprocessBuild (BuildTarget target, string pathToBuiltProject)
{
    if (target == BuildTarget.Android)
    {
        OnPostprocessBuildAndroid(pathToBuiltProject);
    }
    else if (target == BuildTarget.iOS)
    {
        OnPostprocessBuildIOS(pathToBuiltProject);
    }            
}

看一下iOS具体的处理，可以添加引用库，修改info.plist等，在Build iOS项目的时生成xCode工程时会自动处理，方便iOS打包

 private static void OnPostprocessBuildIOS(string pathToBuiltProject)
    {
#if UNITY\_EDITOR\_OSX
        PBXProject project = new PBXProject();
        string configFilePath = PBXProject.GetPBXProjectPath(pathToBuiltProject);
        project.ReadFromFile(configFilePath);

        string targetGuid = project.TargetGuidByName("Unity-iPhone");
        string debug = project.BuildConfigByName(targetGuid, "Debug");
        string release = project.BuildConfigByName(targetGuid, "Release");
        project.AddBuildPropertyForConfig(debug, "CODE\_SIGN\_RESOURCE\_RULES\_PATH", "$(SDKROOT)/ResourceRules.plist");
        project.AddBuildPropertyForConfig(release, "CODE\_SIGN\_RESOURCE\_RULES\_PATH", "$(SDKROOT)/ResourceRules.plist");

        project.AddFrameworkToProject(targetGuid, "GLKit.framework", true);
        project.SetBuildProperty(targetGuid, "ENABLE_BITCODE", "NO");
        project.WriteToFile(configFilePath);

        //plist
        string plistPath = pathToBuiltProject + "/Info.plist";
        PlistDocument plist = new PlistDocument();
        plist.ReadFromString(File.ReadAllText(plistPath));

        // Get root
        PlistElementDict rootDict = plist.root;

        /\* ipad 关闭分屏 */
        rootDict.SetBoolean("UIRequiresFullScreen", true);
        rootDict.SetString("CFBundleShortVersionString", App.Global.GlobalDef.BundleVer);

        /\* 设置Build值 */
        var now = System.DateTime.Now;
        string time = string.Format("{0}{1:D2}{2:D2}{3:D2}{4:D2}", now.Year, now.Month, now.Day, now.Hour, now.Minute);
        rootDict.SetString("CFBundleVersion", string.Format("{0}.{1}", App.Global.GlobalDef.BundleVer, time));

        /\* iOS9所有的app对外http协议默认要求改成https */
        // Add value of NSAppTransportSecurity in Xcode plist
        var atsKey = "NSAppTransportSecurity";
        PlistElementDict dictTmp = rootDict.CreateDict(atsKey);
        dictTmp.SetBoolean("NSAllowsArbitraryLoads", true);

        // location native development region 
        //rootDict.SetString("CFBundleDevelopmentRegion", "zh_CN");

        /\* for share sdk */
        rootDict.SetString("NSPhotoLibraryUsageDescription", "AR拍照保存与分享");
        rootDict.SetString("NSPhotoLibraryAddUsageDescription", "AR拍照保存与分享");

        /\* 地图定位 */
        rootDict.SetString("NSLocationWhenInUseUsageDescription"
        , "您的位置和方向信息用于乐园中导航,实现虚拟乐园和真实乐园的对应");

        /\* ITSAppUsesNonExemptEncryption 合规证明，未使用加密 */ 
        rootDict.SetBoolean("ITSAppUsesNonExemptEncryption", false);

        File.WriteAllText(plistPath, plist.WriteToString());
        AdapteiPhoneXCode(pathToBuiltProject);
#endif
    }

类似的，Build Android项目时，处理如下：

private static void OnPostprocessBuildAndroid(string pathToBuiltProject)
{
    string exportedPath = Path.Combine(pathToBuiltProject, PlayerSettings.productName);

    //加密
    string\[\] filesToCrypt = new\[\] { "Assembly-CSharp.dll"};
    for (int i = 0; i < filesToCrypt.Length; i++)
    {
        string fileName = filesToCrypt\[i\];
        string filePath = UnityLibs.Common.FileUtils.SearchFile(exportedPath, fileName);
        if (!string.IsNullOrEmpty(filePath))
        {
            UnityLibs.DEncrypt.DEncrypt.EncryptFile(filePath, "", App.Global.GlobalDef.DEncrypt\_Data\_Key + "~");
        }
    }

    //替换
    string\[\] srcToReplace = new\[\] { "../Client/Publish/libmono.so" };
    string\[\] desToReplace = new\[\] { "libmono.so" };
    for (int i = 0; i < desToReplace.Length; i++)
    {
        string destName = desToReplace\[i\];
        string destPath = UnityLibs.Common.FileUtils.SearchFile(exportedPath, destName);
        if (!string.IsNullOrEmpty(destPath))
        {
            //delete
            UnityLibs.Common.FileUtils.DeleteFile(destPath);

            //copy
            string src = srcToReplace\[i\];
            string srcFull = Path.GetFullPath(src);
            UnityLibs.Common.FileUtils.CopyFile(srcFull, destPath, true);
        }
    }
}

说明：

1.需要实现互通的加解密方式：C#加密，C解密；

2.文件仅做了加密，未做混淆处理； 先简单实现，后优化提高！

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