PrefabUtility

Вспомогательный класс для любых операций, связанных с префабами.

// This script creates a new menu item Examples>Create Prefab in the main menu.
// Use it to create Prefab(s) from the selected GameObject(s).
// It is placed in the root Assets folder.
using System.IO;
using UnityEngine;
using UnityEditor;

public class Example
{
    // Creates a new menu item 'Examples > Create Prefab' in the main menu.
    [MenuItem("Examples/Create Prefab")]
    static void CreatePrefab()
    {
        // Keep track of the currently selected GameObject(s)
        GameObject[] objectArray = Selection.gameObjects;

        // Loop through every GameObject in the array above
        foreach (GameObject gameObject in objectArray)
        {
            // Create folder Prefabs and set the path as within the Prefabs folder,
            // and name it as the GameObject's name with the .Prefab format
            if (!Directory.Exists("Assets/Prefabs"))
                AssetDatabase.CreateFolder("Assets", "Prefabs");
            string localPath = "Assets/Prefabs/" + gameObject.name + ".prefab";

            // Make sure the file name is unique, in case an existing Prefab has the same name.
            localPath = AssetDatabase.GenerateUniqueAssetPath(localPath);

            // Create the new Prefab and log whether Prefab was saved successfully.
            bool prefabSuccess;
            PrefabUtility.SaveAsPrefabAssetAndConnect(gameObject, localPath, InteractionMode.UserAction, out prefabSuccess);
            if (prefabSuccess == true)
                Debug.Log("Prefab was saved successfully");
            else
                Debug.Log("Prefab failed to save" + prefabSuccess);
        }
    }

    // Disable the menu item if no selection is in place.
    [MenuItem("Examples/Create Prefab", true)]
    static bool ValidateCreatePrefab()
    {
        return Selection.activeGameObject != null && !EditorUtility.IsPersistent(Selection.activeGameObject);
    }
}