Unity的IPostBuildPlayerScriptDLLs实用案例深入解析

什么是IPostBuildPlayerScriptDLLs

IPostBuildPlayerScriptDLLs是Unity中的一个接口类，可以在BuildPlayer过程中自定义处理DLL文件。通过在Unity编辑器中实现该接口，可以在生成构建设置时自定义处理DLL文件，从而满足项目需求。

如何实现IPostBuildPlayerScriptDLLs接口

要实现IPostBuildPlayerScriptDLLs接口，可以在Unity编辑器中的一个自定义类中实现接口方法：

using UnityEngine;
using UnityEditor.Build;
using UnityEditor.Build.Reporting;
using System.IO;
using System.Linq;

public class MyPostBuildPlayer : IPostBuildPlayerScriptDLLs
{
    public int callbackOrder { get { return 0; } }

    public void OnPostBuildPlayerScriptDLLs(BuildReport report)
    {
        string buildPath = Path.GetDirectoryName(report.summary.outputPath);
        string dataPath = Path.GetDirectoryName(Application.dataPath);

        // Do something with the DLL files
    }
}

IPpostBuildPlayerScriptDLLs的应用实例

示例1：自定义处理DLL文件

假设项目中包含一个需要加密的DLL文件，在生成构建设置时需要自动加密该DLL文件，可以使用IPostBuildPlayerScriptDLLs接口实现：

using UnityEngine;
using UnityEditor.Build;
using UnityEditor.Build.Reporting;
using System;
using System.IO;
using System.Linq;
using System.Security.Cryptography;

public class MyPostBuildPlayer : IPostBuildPlayerScriptDLLs
{
    public int callbackOrder { get { return 0; } }

    public void OnPostBuildPlayerScriptDLLs(BuildReport report)
    {
        string buildPath = Path.GetDirectoryName(report.summary.outputPath);
        string dataPath = Path.GetDirectoryName(Application.dataPath);
        string dllPath = Path.Combine(buildPath, "Plugins/MyDll.dll");

        if (!File.Exists(dllPath))
        {
            Debug.LogError("MyDll.dll not found!");
            return;
        }

        // 加密DLL文件
        byte[] dllData = File.ReadAllBytes(dllPath);
        byte[] key = new byte[16] { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00 };
        byte[] iv = new byte[16] { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff };

        using (RijndaelManaged rijAlg = new RijndaelManaged())
        {
            rijAlg.Key = key;
            rijAlg.IV = iv;
            ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
            using (MemoryStream msEncrypt = new MemoryStream())
            {
                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                {
                    csEncrypt.Write(dllData, 0, dllData.Length);
                    csEncrypt.FlushFinalBlock();
                    byte[] encryptedData = msEncrypt.ToArray();
                    File.WriteAllBytes(dllPath, encryptedData);
                }
            }
        }
    }
}

示例2：自动将DLL文件复制到其他目录

假设需要自动生成一份DLL文件副本到另一个目录，可以使用IPostBuildPlayerScriptDLLs接口实现：

using UnityEngine;
using UnityEditor.Build;
using UnityEditor.Build.Reporting;
using System;
using System.IO;
using System.Linq;

public class MyPostBuildPlayer : IPostBuildPlayerScriptDLLs
{
    public int callbackOrder { get { return 0; } }

    public void OnPostBuildPlayerScriptDLLs(BuildReport report)
    {
        string buildPath = Path.GetDirectoryName(report.summary.outputPath);
        string dataPath = Path.GetDirectoryName(Application.dataPath);
        string sourcePath = Path.Combine(buildPath, "Plugins/MyDll.dll");
        string targetPath = Path.Combine(buildPath, "MyDLLCopied.dll");

        File.Copy(sourcePath, targetPath, true);
    }
}

总结

IPostBuildPlayerScriptDLLs接口是Unity里一个非常实用的功能，通过实现该接口，可以自定义处理生成构建设置时的DLL文件，满足项目需求。本文介绍了IPostBuildPlayerScriptDLLs接口的基本使用方法，并通过两个示例详细说明了如何自定义处理DLL文件。