[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

 1 using UnityEngine;
 2 using System.Collections.Generic;
 3 using UnityEditor;
 4 
 5 public class PrefabEditor {
 6 
 7     private static string[] searchFolders = new string[] { "Assets/Prefab", }; //查找路径
 8 
 9     [MenuItem("GameObject/RefreshPrefab", priority = 1)]
10     static void RefreshPrefab()
11     {
12         List<string> paths = new List<string>();
13         var ids = AssetDatabase.FindAssets("t:Prefab", searchFolders);
14         for (int i = 0; i < ids.Length; i++)
15         {
16             var path = AssetDatabase.GUIDToAssetPath(ids[i]);
17             paths.Add(path);
18         }
19 
20         var goes = Selection.gameObjects;
21         for (int i = 0; i < goes.Length; i++)
22         {
23             var go = goes[i];
24 
25             //找出对应的Project中的prefab
26             GameObject prefabGo = null;
27             for (int j = 0; j < paths.Count; j++)
28             {
29                 if (paths[j].Contains(go.name + ".prefab"))
30                 {
31                     prefabGo = AssetDatabase.LoadAssetAtPath<GameObject>(paths[j]);
32                     break;
33                 }
34             }
35 
36             //替换
37             if (prefabGo)
38             {
39                 var pos = go.transform.localPosition;
40                 var rot = go.transform.localEulerAngles;
41                 var sca = go.transform.localScale;
42 
43                 GameObject tempGo = PrefabUtility.ConnectGameObjectToPrefab(go, prefabGo);
44                 tempGo.transform.localPosition = pos;
45                 tempGo.transform.localEulerAngles = rot;
46                 tempGo.transform.localScale = sca;
47             }
48         }
49     }
50 }