Unity有个很烦人的规则：只要继承于MonoBehaviour类的脚本必须要达成文件名与类名相等，然而在Unity编辑器中重命名一个集成与MonoBehaviour的脚本并不会重命名脚本里的class name。于是我们经常重命名完一个脚本的文件名，Unity编译一次；然后进入脚本编辑软件把该脚本的class name重命名保存，Unity再编译一次。

This is such a waste of time and human resources!

所以我今天忍不住写了一段一键重命名的Editor小脚本分享给大家。

脚本的限制:
a. 该脚本只重命名与文件名相同的类名。
b. 重命名一个脚本并不会更新其它脚本对该脚本名称的引用。

using UnityEngine;
using UnityEditor;
using System.Text.RegularExpressions;
using System.IO;

[CustomEditor(typeof(MonoScript))]
public class ScriptRenameEditor : Editor
{
    private string fileName = "";
    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();
        var t = target as MonoScript;
        EditorGUILayout.BeginHorizontal();
        var width = Screen.width * 2f / 3f;
        //显示文本框让用户输入新的文件名
        fileName = EditorGUILayout.TextField("New Filename", fileName, GUILayout.Width(width));
        if (GUILayout.Button("Rename"))
        {
            //匹配文件名和父类的名字
            var match = Regex.Match(t.text, @"class\s*(?<filename>" + t.name + @")\s*(\s*:\s*(?<basetype>[a-zA-Z0-9\_]+))?\s*\{");
            if (match.Success)
            {
                var name = t.name;
                var index = match.Groups["filename"].Index;
                var finalText = t.text.Substring(0, index) + fileName + t.text.Substring(index + name.Length);
                var filePath = AssetDatabase.GetAssetPath(t);
                Debug.Log("renaming " + filePath);
                //如果不存在父类,或者父类的名字不叫MonoBehaviour就弹窗警告用户.
                if (match.Groups["basetype"] == null || match.Groups["basetype"].Value != "MonoBehaviour")
                {
                    if (!EditorUtility.DisplayDialog("This script is not derived by MonoBehaviour", "do you really want to rename it?", "yes", "no"))
                    {
                        return;
                    }
                }
                using (var fs = File.Open(filePath, FileMode.Truncate))
                using (var wr = new StreamWriter(fs, System.Text.Encoding.UTF8))
                {
                    wr.Write(finalText);
                }
                var fi = new FileInfo(filePath);
                File.Move(filePath, fi.DirectoryName + Path.DirectorySeparatorChar + fileName + fi.Extension);
                AssetDatabase.Refresh();
                Selection.activeObject = AssetDatabase.LoadAssetAtPath<Object>(filePath.Replace(name, fileName));
            }
            else
            {
                Debug.Log("no class named \"" + t.name + "\" was found.");
            }
        }
        EditorGUILayout.EndHorizontal();
        //显示文件的预览内容
        if (t != null)
        {
            var text = t.text;
            if (text.Length > 1000)
                text = text.Substring(0, 1000) + "\n\n\n  ...";
            GUILayout.TextArea(text);
        }
    }

    private void OnEnable()
    {
        var t = target as MonoScript;
        fileName = t.name;
    }
}

最终的效果如下:

Paste_Image.png