下面代码列出了对于assetbundle资源的常用操作，其中有针对bundle、asset、gameobject三种类型对象的操作，实际使用中尽量保证成对使用。

　　这一块的操作比较繁琐，但只要使用正确，是可以保证资源完全没有泄露的。

using UnityEngine;using System.Collections;public class TestAssetBundle : MonoBehaviour{    public string AssetBundleName = "cube1.assetbundle";    private string dir = "";    private AssetBundle bundle = null;    private UnityEngine.Object asset = null;    private GameObject go = null;    private void Start() { dir = Application.dataPath + "/StreamingAssets/"; }    private void OnGUI()    {        // 这些操作一遍走下来，申请的资源是可以完全回收的        if (GUILayout.Button("LoadAssetBundle", GUILayout.Width(200), GUILayout.Height(50))) { LoadBundle(); }        if (GUILayout.Button("LoadAsset", GUILayout.Width(200), GUILayout.Height(50))) { LoadAsset(); }        if (GUILayout.Button("Instantiate", GUILayout.Width(200), GUILayout.Height(50))) { Instantiate(); }        if (GUILayout.Button("Destroy", GUILayout.Width(200), GUILayout.Height(50))) { Destroy(); }        if (GUILayout.Button("Unload", GUILayout.Width(200), GUILayout.Height(50))) { Unload(); }        if (GUILayout.Button("UnloadForce", GUILayout.Width(200), GUILayout.Height(50))) { UnloadForce(); }        if (GUILayout.Button("UnloadUnusedAssets", GUILayout.Width(200), GUILayout.Height(50))) { UnloadUnusedAssets(); }    }    // 加载AssetBundle    private void LoadBundle()    {        bundle = AssetBundle.LoadFromFile(System.IO.Path.Combine(dir, AssetBundleName));        if (bundle == null) Debug.LogError("LoadBundle Failed");    }    // 从AssetBundle加载Asset    private void LoadAsset()    {        if (bundle == null) return;        asset = bundle.LoadAsset("Cube1");        if (asset == null) Debug.LogError("LoadAsset Failed");    }    // 根据Asset实例化GameObject    private void Instantiate()    {        if (asset == null) return;        go = GameObject.Instantiate(asset) as GameObject;        if (go == null) Debug.LogError("Instantiate Failed");    }    // 销毁GameObject    private void Destroy()    {        if (go == null) return;        GameObject.Destroy(go);        go = null;    }    // 弱卸载，释放AssetBundle本身的内存    private void Unload()    {        if (bundle == null) return;        // unload完，bundle就不能再用了，记得要置空        bundle.Unload(false);        asset = null;        bundle = null;    }    // 强卸载（无视引用的卸载），释放AssetBundle本身的内存，同时回收从AssetBundle抽取的Asset    private void UnloadForce()    {        if (bundle == null) return;        // unload完，bundle就不能再用了，记得要置空        bundle.Unload(true);        asset = null;        bundle = null;    }    // 全局弱卸载，回收无引用Asset    private void UnloadUnusedAssets()    {        Resources.UnloadUnusedAssets();    }}

　　由于bundle相互之前会有依赖，所以在使用一个bundle包之前，需要先加载其依赖的所有bundle包，这个过程需要借助全局manifest来实现，简单代码如下：

using UnityEngine;using System.Collections;public class TestManifest : MonoBehaviour{    private string dir = "";    private GameObject go = null;    private AssetBundleManifest manifest = null;    private void Start() { dir = Application.dataPath + "/StreamingAssets/"; }    private void OnGUI()    {        if (GUILayout.Button("LoadAssetBundleManifest", GUILayout.Width(200), GUILayout.Height(50))) { LoadAssetBundleManifest(); }        if (GUILayout.Button("LoadBundle", GUILayout.Width(200), GUILayout.Height(50))) { LoadBundle(); }    }    // 加载Manifest    private void LoadAssetBundleManifest()    {        var bundle = AssetBundle.LoadFromFile(System.IO.Path.Combine(dir, "StreamingAssets"));        manifest = bundle.LoadAsset
     
      ("AssetBundleManifest");        // 压缩包释放掉        bundle.Unload(false);        bundle = null;    }    // 加载AssetBundle    private void LoadBundle()    {        string bundleName = "assets.resources.test.cube1.prefab.assetbundle";        // 注意：GetAllDependencies会返回直接和间接关联的AssetBundle        //       加载依赖包没有顺序要求        string[] dependence = manifest.GetAllDependencies(bundleName);        for (int i = 0; i < dependence.Length; ++i )        {            AssetBundle.LoadFromFile(System.IO.Path.Combine(dir, dependence[i]));            // 注意：这里不需要手动LoadAsset            //       只需要加载AssetBundle即可            //       Asset会在加载其它关联Asset时自动加载        }        var bundle = AssetBundle.LoadFromFile(System.IO.Path.Combine(dir, bundleName));        var asset = bundle.LoadAsset("Cube1");        go = GameObject.Instantiate(asset) as GameObject;    }}