动态加载

首先得用ExportResourceBySelection这个类打包预设名字为：Sphere.unity3d  我的电脑上的保存路径为：file:///D:/MyUnity4.6Project/Test/Assets/Resources/prefab/

要选中预设Sphere,右键Build AssetBundle From Selection，保存为：Sphere.unity3d

public class ExportResourceBySelection
{
    [MenuItem("Assets/Build AssetBundle From Selection")]
    static void ExportResource()
    {
        string path = EditorUtility.SaveFilePanel ("Save Resource", "", "New Resource", "unity3d");//打包成.unity3d格式，根据需要你可以是assetbundle格式的，默认名字是：New Resource
        if (path.Length != 0)
        {
            Object[] selections = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);
            BuildPipeline.BuildAssetBundle(Selection.activeObject, selections, path, BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets, BuildTarget.StandaloneWindows);
            AssetDatabase.Refresh();
        }
    }
}

如何动态加载prefab实例呢

通过下面这个类：下面采用了两种方式，一个是Resources.LoadAssetAtPath(),一个是 AssetBundle的 new WWW()

/// <summary>
/// 动态加载Prefab实例
/// </summary>
public class LoadPrefab : MonoBehaviour
{
    /// <summary>
    /// 加载方法枚举
    /// </summary>
    public enum LoadMethod
    {
        Resources,
        AssetBundle
    }


    /// <summary>
    /// 加载方法
    /// </summary>
    public LoadMethod method;


    // Use this for initialization
    private void Start()
    {
        if (method == LoadMethod.Resources)
            LoadPrefabByResources();
        else
            LoadPrefabByAssetBundle();
    }


    // 通过Resources.LoadAtPath方法动态加载Prefab
    private void LoadPrefabByResources()
    {
        Object prefab = Resources.LoadAssetAtPath("Assets/Prefabs/Cube.prefab", typeof(GameObject));//Resources.LoadAssetAtPath加载unity工程下指定目录的文件，该

//目录可以是unity目录下任意的，而Resources.Load()的局限性是必须是：Resources路径下的文件或者子文件

        GameObject cube = (GameObject)Instantiate(prefab);
        cube.transform.parent = transform;
    }


    // 通过AssetBundle方式动态加载Prefab
    private void LoadPrefabByAssetBundle()
    {
        //string path = "http://192.168.12.75/Sphere.unity3d";//加载服务器端的文件
        string path = "file:///D:/MyUnity4.6Project/Test/Assets/Resources/prefab/Sphere.unity3d";//加载本机磁盘路径的文件
        StartCoroutine(DownLoadPrefab(path));
    }


    // 下载Prefab文件
    private IEnumerator DownLoadPrefab(string path)
    {
        Debug.Log(Application.persistentDataPath);
        WWW www = new WWW(path);
        yield return www;


        if (www.isDone)
        {
            GameObject sphere = (GameObject)Instantiate(www.assetBundle.mainAsset);
            sphere.transform.parent = transform;
            yield return sphere;
            www.assetBundle.Unload(false);
        }
    }
}