Unity5 AssetBundle 打包和下载

Posted 2020-06-26

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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！！

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