[Unity工具]嵌套Prefab

在父Prefab中嵌套子Prefab，那么如果对这个嵌套Prefab进行修改，改变将不会应用到子Prefab中；同理，对子Prefab的修改，也不会应用到这个嵌套Prefab中。因此，就会出现一些问题，例如子Prefab已经是最新的了，但是嵌套Prefab却是旧的。在unity2018.3中，已经有新功能来处理嵌套Prefab的问题了，但是之前的版本还是得要处理这个问题。

1.替换Prefab

如图，Button是父Prefab，RawImage是子Prefab，Button下的RawImage是嵌套Prefab

选中嵌套Prefab，右键选择RefreshPrefab，即可将其替换为子Prefab

PrefabEditor.cs

using UnityEngine;
using System.Collections.Generic;
using UnityEditor;

public class PrefabEditor {

    private static string[] searchFolders = new string[] { "Assets/Prefab", }; //查找路径

    [MenuItem("GameObject/RefreshPrefab", priority = 1)]
    static void RefreshPrefab()
    {
        List<string> paths = new List<string>();
        var ids = AssetDatabase.FindAssets("t:Prefab", searchFolders);
        for (int i = 0; i < ids.Length; i++)
        {
            var path = AssetDatabase.GUIDToAssetPath(ids[i]);
            paths.Add(path);
        }

        var goes = Selection.gameObjects;
        for (int i = 0; i < goes.Length; i++)
        {
            var go = goes[i];

            //找出对应的Project中的prefab
            GameObject prefabGo = null;
            for (int j = 0; j < paths.Count; j++)
            {
                if (paths[j].Contains(go.name + ".prefab"))
                {
                    prefabGo = AssetDatabase.LoadAssetAtPath<GameObject>(paths[j]);
                    break;
                }
            }

            //替换
            if (prefabGo)
            {
                var pos = go.transform.localPosition;
                var rot = go.transform.localEulerAngles;
                var sca = go.transform.localScale;

                GameObject tempGo = PrefabUtility.ConnectGameObjectToPrefab(go, prefabGo);
                tempGo.transform.localPosition = pos;
                tempGo.transform.localEulerAngles = rot;
                tempGo.transform.localScale = sca;
            }
        }
    }
}