1. 在场景中实例化Prefab

    public GameObject LoadPrefabToScene(string loadPath,string prefabName)
    {
        //加载路径
        string loadFullPathName = string.Format("{0}/{1}.prefab",loadPath,prefabName);
        //加载预制体
        GameObject prefabSource = AssetDatabase.LoadAssetAtPath<GameObject>(loadFullPathName);
        if(prefabSource == null)
        {
            Debug.LogError("加载路径错误 : " + loadFullPathName);
            return null;
        }
        //在场景中实例化
        GameObject prefabGameObj = PrefabUtility.InstantiatePrefab(prefabSource) as GameObject;

        //修改物体信息
        prefabGameObj.transform.position = Vector3.zero;
        prefabGameObj.transform.rotation = Quaternion.identity;
        prefabGameObj.transform.localScale = Vector3.one;
        prefabGameObj.transform.SetAsLastSibling();

        //解除预制体关系
        if(PrefabUtility.IsAnyPrefabInstanceRoot(prefabGameObj))
            PrefabUtility.UnpackPrefabInstance(prefabGameObj,PrefabUnpackMode.OutermostRoot,InteractionMode.AutomatedAction);
        //
        return prefabGameObj;
    }

2. 修改Prefab实例，可以增删修改子节点，比如给制定名字的子节点添加组件

    public void AddComponentByName<T>(GameObject root,string startSignStr) where T : Component
    {
        if(root == null || root.transform.childCount == 0)
            return;

        for(int i = 0; i < root.transform.childCount; i++)
        {
            GameObject child = root.transform.GetChild(i).gameObject;
            string name = child.name;

            if(name.StartsWith(startSignStr))
            {
                child.AddComponent<T>();
            }

            if(root.transform.childCount > 0)
                AddComponentByName<T>(child,startSignStr);
        }
    }

3. 保存Prefab，删除场景中的实例

    public bool SaveNewPrefab(GameObject prefabGameObj,string savePath,string prefabName)
    {
        if(prefabGameObj == null)
            return false;

        if(!Directory.Exists(savePath))
            Directory.CreateDirectory(savePath);

        string fullPath = string.Format("{0}/{1}.prefab",savePath,prefabName);

        if(File.Exists(fullPath))
        {
            Debug.LogError("同名文件已存在 : " + fullPath);
            return false;
        }

        bool savePrefabResult;
        PrefabUtility.SaveAsPrefabAsset(prefabGameObj,fullPath,out savePrefabResult);

        GameObject.DestroyImmediate(prefabGameObj);

        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();

        if(savePrefabResult)
            Debug.Log("保存成功 : " + fullPath);
        else
            Debug.LogError("保存失败 : " + fullPath);

        return savePrefabResult;
    }

4. 可以省略prefabName参数，批量编辑文件夹下多个Prefab···