下面实现的一个功能是对一个文件夹下的所有prefab批量修改，比如移除某个子物体，添加一个组件等，然后保存到另一个新的文件夹下；
如下，我们实现一个扩展窗口，用于选择源文件夹和目标文件夹；然后遍历所有的prefab，进行修改，然后保存到新文件夹下，在保存之前检查资源是否存在，如果已存在，就移除再保存新的；
首先，在unity内加载资源时用的是工程的相对路径，而对于C#的IO来说，需要用绝对路径，那么先提供一组相对路径和绝对路径之间的转换接口，如下所示，这里使用了正则替换，注意模式字符串要用@前缀标记为原义；
public static string GetRelativePath(string path){string srcPath = path.Replace("\\", "/");var retPath = Regex.Replace(srcPath, @"\b.*Assets", "Assets");return retPath;}public static string GetAbsolutePath(string path){string srcPath = path.Replace("\\", "/");var retPath = Regex.Replace(srcPath, @"\b.*Assets", Application.dataPath);return retPath;}
然后就是简单的编辑器扩展功能，这里要使用PrefabUtility来进行prefab的保存，而不能使用AssetDatabase的接口；
using UnityEngine;using UnityEditor;using System.IO;public class ArtActorPrefabModifyWindow : EditorWindow{public static string assetSrcFolderPath = Application.dataPath + "/Resources/Prefabs/FashionPartPrefab";public static string assetDstFolderPath = "Assets/Resources/Prefabs/FashionPartPrefabNew";[MenuItem ("====Tools====/Prefab/移除时装部件内的骨骼")]public static void ShowWindow () {EditorWindow thisWindow = EditorWindow.GetWindow(typeof(ArtActorPrefabModifyWindow));thisWindow.titleContent = new GUIContent("骨骼移除");thisWindow.position = new Rect(Screen.width/2, Screen.height/2, 600, 800);}void OnGUI(){EditorGUILayout.BeginHorizontal();EditorGUILayout.LabelField("选择源文件夹");EditorGUILayout.TextField(assetSrcFolderPath);if (GUILayout.Button("选择")){assetSrcFolderPath = EditorUtility.OpenFolderPanel("选择文件夹", assetSrcFolderPath, "");}EditorGUILayout.EndHorizontal();EditorGUILayout.BeginHorizontal();EditorGUILayout.LabelField("选择源文件夹");EditorGUILayout.TextField(assetDstFolderPath);if (GUILayout.Button("选择")){assetDstFolderPath = EditorUtility.OpenFolderPanel("选择文件夹", assetDstFolderPath, "");}EditorGUILayout.EndHorizontal();if (GUILayout.Button("开始提取") && assetSrcFolderPath != null && assetDstFolderPath != null){Seperate();}}private static void Seperate(){assetSrcFolderPath = PathUtil.GetAbsolutePath(assetSrcFolderPath);var files = Directory.GetFiles(assetSrcFolderPath, "*.prefab");string dstPath = PathUtil.GetRelativePath(assetDstFolderPath);foreach (var file in files){string srcPath = PathUtil.GetRelativePath(file);GameObject srcObj = AssetDatabase.LoadAssetAtPath(srcPath, typeof(GameObject)) as GameObject;if (srcObj == null)continue;GameObject dstObj = AssetDatabase.LoadAssetAtPath(dstPath, typeof(GameObject)) as GameObject;if (dstObj != null)AssetDatabase.DeleteAsset(dstPath);dstObj = GameObject.Instantiate(srcObj);Transform avatar = dstObj.transform.Find("Bip001");if (avatar != null) {GameObject.DestroyImmediate(avatar.gameObject);PrefabUtility.SaveAsPrefabAsset(dstObj, dstPath + "/" + srcObj.name + ".prefab");}GameObject.DestroyImmediate(dstObj);}}}
