Unity5 AssetBundle 打包和下载

打包

using UnityEngine;
using System.Collections;
using UnityEditor;
using System.IO;

/// <summary>
/// 把Resource下的资源打包成.unity3d 到StreamingAssets目录下
/// </summary>
public class Builder : Editor
{
    public static string sourcePath = Application.dataPath + "/Resources";
    const string AssetBundlesOutputPath = "Assets/StreamingAssets";

    [MenuItem("Tools/AssetBundle/Build")]
    public static void BuildAssetBundle()
    {
        Caching.CleanCache();
        ClearAssetBundlesName();

        Pack(sourcePath);

        string outputPath = Path.Combine(AssetBundlesOutputPath, Platform.GetPlatformFolder(EditorUserBuildSettings.activeBuildTarget));
        if (!Directory.Exists(Application.dataPath + "/../Assetbundle"))
        {
            Directory.CreateDirectory(Application.dataPath + "/../Assetbundle");
        }
        Debug.Log(outputPath);
        //根据BuildSetting里面所激活的平台进行打包
       // BuildPipeline.BuildAssetBundles(outputPath, 0, EditorUserBuildSettings.activeBuildTarget);
        BuildPipeline.BuildAssetBundles(Application.dataPath + "/../Assetbundle", BuildAssetBundleOptions.UncompressedAssetBundle);
        AssetDatabase.Refresh();

        Debug.Log("打包完成");

    }

    /// <summary>
    /// 清除之前设置过的AssetBundleName，避免产生不必要的资源也打包
    /// 之前说过，只要设置了AssetBundleName的，都会进行打包，不论在什么目录下
    /// </summary>
    static void ClearAssetBundlesName()
    {
        int length = AssetDatabase.GetAllAssetBundleNames().Length;
        Debug.Log(length);
        string[] oldAssetBundleNames = new string[length];
        for (int i = 0; i < length; i++)
        {
            oldAssetBundleNames[i] = AssetDatabase.GetAllAssetBundleNames()[i];
        }

        for (int j = 0; j < oldAssetBundleNames.Length; j++)
        {
            AssetDatabase.RemoveAssetBundleName(oldAssetBundleNames[j], true);
        }
        length = AssetDatabase.GetAllAssetBundleNames().Length;
        Debug.Log(length);
    }

    static void Pack(string source)
    {
        DirectoryInfo folder = new DirectoryInfo(source);
        FileSystemInfo[] files = folder.GetFileSystemInfos();
        int length = files.Length;
        for (int i = 0; i < length; i++)
        {
            if (files[i] is DirectoryInfo)
            {
                Pack(files[i].FullName);
            }
            else
            {
                if (!files[i].Name.EndsWith(".meta"))
                {
                    file(files[i].FullName);
                }
            }
        }
    }

    static void file(string source)
    {
        string _source = Replace(source);
        string _assetPath = "Assets" + _source.Substring(Application.dataPath.Length);
        string _assetPath2 = _source.Substring(Application.dataPath.Length + 1);
        //Debug.Log (_assetPath);

        //在代码中给资源设置AssetBundleName
        AssetImporter assetImporter = AssetImporter.GetAtPath(_assetPath);
        string assetName = _assetPath2.Substring(_assetPath2.IndexOf("/") + 1);
        assetName = assetName.Replace(Path.GetExtension(assetName), ".unity3d");
        //Debug.Log (assetName);
        assetImporter.assetBundleName = assetName;
    }

    static string Replace(string s)
    {
        return s.Replace("\\", "/");
    }
}

public class Platform
{
    public static string GetPlatformFolder(BuildTarget target)
    {
        switch (target)
        {
            case BuildTarget.Android:
                return "Android";
            case BuildTarget.iOS:
                return "IOS";
            case BuildTarget.WebPlayer:
                return "WebPlayer";
            case BuildTarget.StandaloneWindows:
            case BuildTarget.StandaloneWindows64:
                return "Windows";
            case BuildTarget.StandaloneOSXIntel:
            case BuildTarget.StandaloneOSXIntel64:
            case BuildTarget.StandaloneOSXUniversal:
                return "OSX";
            default:
                return null;
        }
    }
}

• 读取

  using UnityEngine;
  using System.Collections;
  using System.Collections.Generic;
  
  public class Test : MonoBehaviour
  {
      AssetBundle manifestBundle = null;
      AssetBundle cubeBundle = null;
      private string buildPath = Application.dataPath + "/../Assetbundle/";
  
      public Dictionary<string, AssetBundle> bundleList = new Dictionary<string, AssetBundle>();
      // Use this for initialization
      void Start()
      {
          LoadBundle("");
      }
  
      public void LoadBundle(string name) {
      }
  
      //单独读取资源
      private IEnumerator LoadGameObjectPackedByThemselves(string path)
      {
          Debug.Log(path);
          //WWW bundle = new WWW(path);
          //yield return bundle;
  
          WWW www = WWW.LoadFromCacheOrDownload(path, 5);
          yield return www;
          //加载
          //Instantiate(bundle.assetBundle);
  
          //www.assetBundle.Unload(false);
      }
  
      void OnGUI()
      {
          if (GUILayout.Button("LoadAssetbundle"))
          {
              //首先加载Manifest文件;
              if (bundleList.ContainsKey(buildPath + ResourceConfig.MainAssetBundle))
              {
                  manifestBundle = bundleList[buildPath + ResourceConfig.MainAssetBundle];
              }
              else
              {
                  manifestBundle = AssetBundle.LoadFromFile(buildPath + ResourceConfig.MainAssetBundle);
                  bundleList.Add(buildPath + ResourceConfig.MainAssetBundle, manifestBundle);
              }
  
              //manifestBundle = AssetBundle.LoadFromFile(Application.dataPath + "/../Assetbundle/Assetbundle");
              Debug.Log(buildPath + ResourceConfig.MainAssetBundle);
              if (manifestBundle != null)
              {
                  AssetBundleManifest manifest = (AssetBundleManifest)manifestBundle.LoadAsset("AssetBundleManifest");
                  if (manifest == null) {
                      Debug.Log("manifest == null");
                  }
                  //获取依赖文件列表;
                  string[] cubedepends = manifest.GetAllDependencies(ResourceConfig.BundleTextPrefabPath);
                  AssetBundle[] dependsAssetbundle = new AssetBundle[cubedepends.Length];
  
                  for (int index = 0; index < cubedepends.Length; index++)
                  {
                      //加载所有的依赖文件;
                      if (bundleList.ContainsKey(buildPath + cubedepends[index]))
                      {
                          continue;
                      }
                      dependsAssetbundle[index] = AssetBundle.LoadFromFile(buildPath + cubedepends[index]);
                      bundleList.Add(buildPath + cubedepends[index], dependsAssetbundle[index]);
  
                  }
                  //加载我们需要的文件;
                  if (bundleList.ContainsKey(buildPath + ResourceConfig.BundleTextPrefabPath))
                  {
                      cubeBundle = bundleList[buildPath + ResourceConfig.BundleTextPrefabPath];
                  }
                  else {
                      cubeBundle = AssetBundle.LoadFromFile(buildPath + ResourceConfig.BundleTextPrefabPath);
                      bundleList.Add(buildPath + ResourceConfig.BundleTextPrefabPath , cubeBundle);
                  }
  
                  GameObject cube = cubeBundle.LoadAsset("bundletextprefab") as GameObject;
                  if (cube != null)
                  {
                      //GameObject o = Instantiate(cube);
                      //o.transform.parent = GameObject.Find("Camera").transform;
                      GameObject obj = NGUITools.AddChild(GameObject.Find("Camera"), cube);
                  }
              }
  
          }
      }
  
      public AssetBundle DownBundle(string path) {
  
          if (bundleList.ContainsKey(buildPath + ResourceConfig.MainAssetBundle))
          {
              manifestBundle = bundleList[buildPath + ResourceConfig.MainAssetBundle];
          }
          else
          {
              manifestBundle = AssetBundle.LoadFromFile(buildPath + ResourceConfig.MainAssetBundle);
              bundleList.Add(buildPath + ResourceConfig.MainAssetBundle, manifestBundle);
          }
          if (manifestBundle != null)
          {
              AssetBundleManifest manifest = (AssetBundleManifest)manifestBundle.LoadAsset("AssetBundleManifest");
              if (manifest == null)
              {
                  Debug.Log("manifest == null");
              }
              //获取依赖文件列表;
              string[] cubedepends = manifest.GetAllDependencies(ResourceConfig.IconPath);
              AssetBundle[] dependsAssetbundle = new AssetBundle[cubedepends.Length];
  
              for (int index = 0; index < cubedepends.Length; index++)
              {
                  //加载所有的依赖文件;
                  if (bundleList.ContainsKey(buildPath + cubedepends[index]))
                  {
                      continue;
                  }
                  dependsAssetbundle[index] = AssetBundle.LoadFromFile(buildPath + cubedepends[index]);
                  bundleList.Add(buildPath + cubedepends[index], dependsAssetbundle[index]);
  
              }
  
              //加载我们需要的文件;
              if (bundleList.ContainsKey(buildPath + ResourceConfig.IconPath))
              {
                  cubeBundle = bundleList[buildPath + ResourceConfig.IconPath];
              }
              else
              {
                  cubeBundle = AssetBundle.LoadFromFile(buildPath + ResourceConfig.IconPath);
                  bundleList.Add(buildPath + ResourceConfig.IconPath , cubeBundle);
              }
  
          }
          return cubeBundle;
      }
      public void Removebundle() {
          cubeBundle.Unload(false);
          bundleList.Remove(Application.dataPath + "/../Assetbundle/icon.unity3d");
      }
  }

• 这里是  我给资源做的一个全局路径记录  用来 加载

  using UnityEngine;
  using System.Collections;
  using System.Collections.Generic;
  
  public class ResourceConfig  {
  
      public const string MainAssetBundle = "Assetbundle";
  
      public const string BundleItemPath = "Prefabs/BundleItem.prefab";
      public const string BundleTextPrefabPath = "Prefabs/BundleTextPrefab.prefab";
      public const string item1Path = "item1.prefab";
      public const string itemPath = "item.prefab";
      public const string IconPath = "icon.unity3d";
  
  }

• 这里是  View层的调用

  using UnityEngine;
  using System.Collections;
  
  public class BundleTextPrefab : MonoBehaviour {
      public UITexture tex;
      public UITexture tex1;
  
      Test tt;
      // Use this for initialization
      void Start () {
          tt = GameObject.Find("UI Root").gameObject.GetComponent<Test>();
          AssetBundle bundle =  tt.DownBundle("");
          if (bundle == null) Debug.Log("bundle == null");
          tex.mainTexture = bundle.LoadAsset("icon") as Texture2D;
      }
  
      // Update is called once per frame
      void Update () {
          if (Input.GetKeyDown(KeyCode.Y)) {
              tt = GameObject.Find("UI Root").gameObject.GetComponent<Test>();
              AssetBundle bundle = tt.DownBundle("");
              if (bundle == null) Debug.Log("bundle == null");
              tex1.mainTexture = bundle.LoadAsset("icon") as Texture2D;
          }
          if (Input.GetKeyDown(KeyCode.T)) {
              tt.Removebundle();
          }
      }
  }

• 我刚刚 研究Assetbundle  不是很了解   这里只是想做一下记录  上面的代码写的很简陋，是临时做实验写的，以后会慢慢完善,我是打算写出一个游戏的底层框架，包括UI、和异步加载！加油！！