Unity3d资源自动更新
1.创建AssetBudle 通过脚本将一个prefab创建为AssetBudle，将下面代码放入Editor文件夹下面
using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Collections.Generic;
public class ExportAssetBundles : EditorWindow
{
[MenuItem("Assets/Build AssetBundle From Selection")]
static void ExportResourceRespective()
{ // 打开保存面板，获得用户选择的路径
string path = EditorUtility.SaveFilePanel("Save Resource", "", "New Resource", "assetbundle");
if (path.Length != 0)
{
// 选择的要保存的对象
Object[] selection = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);
//打包
BuildPipeline.BuildAssetBundle(Selection.activeObject, selection, path, BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets, BuildTarget.StandaloneWindows);
}
}
[MenuItem("Assets/Save Scene")]
static void ExportScene()
{
// 打开保存面板，获得用户选择的路径
string path = EditorUtility.SaveFilePanel("Save Resource", "", "New Resource", "unity3d");
if (path.Length != 0)
{
// 选择的要保存的对象
Object[] selection = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);
string[] scenes = { "Assets/scene1.unity" };
//打包
BuildPipeline.BuildPlayer(scenes, path, BuildTarget.StandaloneWindows, BuildOptions.BuildAdditionalStreamedScenes);
}
}
}2.本地资源文件以及服务器文件的MD5配置文件生成
public void CreatConfiga(string resPath)
{
string[] files = Directory.GetFiles(resPath, "*", SearchOption.AllDirectories);
System.Text.StringBuilder versions = new System.Text.StringBuilder();
for (int i = 0; i < files.Length; i++)
{
string filePath = files[i];
string extension = filePath.Substring(files[i].LastIndexOf("."));
if (extension == ".assetbundle")
{
string relativePath = filePath.Replace(resPath, "").Replace("\\", "/");
string md5 = MD5File(filePath);
versions.Append(relativePath).Append(",").Append(md5).Append("\n");
}
}
FileStream stream = new FileStream(resPath + "\\" + "version.txt", FileMode.Create);
byte[] data = Encoding.UTF8.GetBytes(versions.ToString());
stream.Write(data, 0, data.Length);
stream.Flush();
stream.Close();
}
public static string MD5File(string file)
{
try
{
FileStream fs = new FileStream(file, FileMode.Open);
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] retVal = md5.ComputeHash(fs);
fs.Close();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < retVal.Length; i++)
{
sb.Append(retVal[i].ToString("x2"));
}
return sb.ToString();
}
catch (System.Exception ex)
{
throw new System.Exception("md5file() fail,error:" + ex.Message);
}
}3.匹配配置文件更新本地资源以及配置文件
//加载本地version配置
StartCoroutine(DownLoad(LOCAL_RES_URL + VERSION_FILE, delegate(WWW localVersion)
{
//保存本地的version
ParseVersionFile(localVersion.text, LocalResVersion);
//加载服务端version配置
StartCoroutine(this.DownLoad(SERVER_RES_URL + VERSION_FILE, delegate(WWW serverVersion)
{
//保存服务端version
ParseVersionFile(serverVersion.text, ServerResVersion);
//计算出需要重新加载的资源
CompareVersion();
//加载需要更新的资源
DownLoadRes();
}));
})); 完整代码：
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
public class ResUpdate : MonoBehaviour
{
public static readonly string VERSION_FILE = "version.txt";
public static readonly string LOCAL_RES_URL = "file:///C:/Test/Res/";
public static readonly string SERVER_RES_URL = "file:///C:/Res/";
public static readonly string LOCAL_RES_PATH = "C:\\Test\\Res";
public static readonly string SERVER_RES_PATH = "C:\\Res";
private Dictionary<string, string> LocalResVersion;
private Dictionary<string, string> ServerResVersion;
private List<string> NeedDownFiles;
private bool NeedUpdateLocalVersionFile = false;
void Start()
{
//初始化
CreatConfiga(LOCAL_RES_PATH);
CreatConfiga(SERVER_RES_PATH);
LocalResVersion = new Dictionary<string, string>();
ServerResVersion = new Dictionary<string, string>();
NeedDownFiles = new List<string>();
//加载本地version配置
StartCoroutine(DownLoad(LOCAL_RES_URL + VERSION_FILE, delegate(WWW localVersion)
{
//保存本地的version
ParseVersionFile(localVersion.text, LocalResVersion);
//加载服务端version配置
StartCoroutine(this.DownLoad(SERVER_RES_URL + VERSION_FILE, delegate(WWW serverVersion)
{
//保存服务端version
ParseVersionFile(serverVersion.text, ServerResVersion);
//计算出需要重新加载的资源
CompareVersion();
//加载需要更新的资源
DownLoadRes();
}));
}));
}
//依次加载需要更新的资源
private void DownLoadRes()
{
if (NeedDownFiles.Count == 0)
{
UpdateLocalVersionFile();
return;
}
string file = NeedDownFiles[0];
NeedDownFiles.RemoveAt(0);
StartCoroutine(this.DownLoad(SERVER_RES_URL + file, delegate(WWW w)
{
//将下载的资源替换本地就的资源
ReplaceLocalRes(file, w.bytes);
DownLoadRes();
}));
}
private void ReplaceLocalRes(string fileName, byte[] data)
{
string filePath = LOCAL_RES_PATH + fileName;
FileStream stream = new FileStream(LOCAL_RES_PATH + fileName, FileMode.Create);
stream.Write(data, 0, data.Length);
stream.Flush();
stream.Close();
}
//显示资源
private IEnumerator Show()
{
string BundleURL = "file:///C:/Test/Res/Cube.unity3d.assetbundle";
using (WWW asset = new WWW(BundleURL))
{
yield return asset;
AssetBundle bundle = asset.assetBundle;
Instantiate(bundle.Load("Cube"));
bundle.Unload(false);
yield return new WaitForSeconds(5);
}
}
//更新本地的version配置
private void UpdateLocalVersionFile()
{
if (NeedUpdateLocalVersionFile)
{
StringBuilder versions = new StringBuilder();
foreach (var item in ServerResVersion)
{
versions.Append(item.Key).Append(",").Append(item.Value).Append("\n");
}
FileStream stream = new FileStream(LOCAL_RES_PATH + "//"+VERSION_FILE, FileMode.Create);
byte[] data = Encoding.UTF8.GetBytes(versions.ToString());
stream.Write(data, 0, data.Length);
stream.Flush();
stream.Close();
}
//加载显示对象
StartCoroutine(Show());
}
private void CompareVersion()
{
foreach (var version in ServerResVersion)
{
string fileName = version.Key;
string serverMd5 = version.Value;
//新增的资源
if (!LocalResVersion.ContainsKey(fileName))
{
NeedDownFiles.Add(fileName);
}
else
{
//需要替换的资源
string localMd5;
LocalResVersion.TryGetValue(fileName, out localMd5);
if (!serverMd5.Equals(localMd5))
{
NeedDownFiles.Add(fileName);
}
}
}
//本次有更新，同时更新本地的version.txt
NeedUpdateLocalVersionFile = NeedDownFiles.Count > 0;
}
private void ParseVersionFile(string content, Dictionary<string, string> dict)
{
if (content == null || content.Length == 0)
{
return;
}
string[] items = content.Split(new char[] { '\n' });
foreach (string item in items)
{
string[] info = item.Split(new char[] { ',' });
if (info != null && info.Length == 2)
{
dict.Add(info[0], info[1]);
}
}
}
private IEnumerator DownLoad(string url, HandleFinishDownload finishFun)
{
WWW www = new WWW(url);
yield return www;
if (finishFun != null)
{
finishFun(www);
}
www.Dispose();
}
public void CreatConfiga(string resPath)
{
string[] files = Directory.GetFiles(resPath, "*", SearchOption.AllDirectories);
System.Text.StringBuilder versions = new System.Text.StringBuilder();
for (int i = 0; i < files.Length; i++)
{
string filePath = files[i];
string extension = filePath.Substring(files[i].LastIndexOf("."));
if (extension == ".assetbundle")
{
string relativePath = filePath.Replace(resPath, "").Replace("\\", "/");
string md5 = MD5File(filePath);
versions.Append(relativePath).Append(",").Append(md5).Append("\n");
}
}
FileStream stream = new FileStream(resPath + "\\" + "version.txt", FileMode.Create);
byte[] data = Encoding.UTF8.GetBytes(versions.ToString());
stream.Write(data, 0, data.Length);
stream.Flush();
stream.Close();
}
public static string MD5File(string file)
{
try
{
FileStream fs = new FileStream(file, FileMode.Open);
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] retVal = md5.ComputeHash(fs);
fs.Close();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < retVal.Length; i++)
{
sb.Append(retVal[i].ToString("x2"));
}
return sb.ToString();
}
catch (System.Exception ex)
{
throw new System.Exception("md5file() fail,error:" + ex.Message);
}
}
public delegate void HandleFinishDownload(WWW www);
}
项目步骤：
1.新建一个场景，将第一步的代码放入Editor文件夹下面。Unity编辑器上面工具栏Asset下面会出现
2.新建一个名字为Cube的预设体，在场景新建一个Cube，赋给预设体。
再在其它文件夹下面创建一个名字为Cube的预设体，赋一个其它物体比如圆形给预设体。
3.选定一个预设体，用第一步的选项创建AssetBudle，本地资源路径放入C:\Test\Res，仿服务端路径放在C:\Res
4.执行上面的脚本 文件夹会添加一个txt配置文件，本地的资源会自动被替换为服务端资源，配置文件也会修改。
最终，只要将服务端的资源文件随便修改，本地加载的资源都会相应的跟着修改。