Unity-Find-Script-References 查找脚本的引用

背景：

有时候我们需要找出项目中所有的引用到某个脚本的地方（比如Prefabs/Scene GameObjects等）。当项目比较大时，手工寻找还是非常费时费力的事情。本文尝试通过插件自动搜索。

分析：

基本的思路是：首先筛选出项目中全部Prefab，加载每个Prefab并判断是否有挂载目标脚本，然后载入每个场景，判断场景中每个物体是否有挂载目标脚本，最后列出结果。

实现：

1，在右键菜单项中添加菜单：

新建一个类，命名为 FindScriptRef ，并继承自 EditorWindow 。添加如下方法：

[MenuItem(“Assets/Find All Reference”)]
public static void ShowWindow()
{
 //Show existing window instance. If one doesn’t exist, make one.
 EditorWindow.GetWindow(typeof(FindScriptRef));
}

这段代码会在菜单中添加一个名为“Find All Reference”的菜单项。选中菜单项会打开一个FindScriptRef窗口实例。当然此时窗口中没有任何内容。

2，窗口基本显示逻辑：

void OnGUI()
{
 if (Selection.activeObject == null)
 {
 GUILayout.Label(“select a script file from Project Window.”);
 return;
 }

//判断选中项是否为脚本
var name = Selection.activeObject.name;
System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
var dict = System.IO.Path.GetDirectoryName(assembly.Location);
assembly = System.Reflection.Assembly.LoadFile(System.IO.Path.Combine(dict, "Assembly-CSharp.dll"));
var selectType = assembly.GetType(name);
if (string.IsNullOrEmpty(name) || selectType == null)
{
    GUILayout.Label("select a script file from Project Window.");
    return;
}

GUILayout.BeginVertical();
GUILayout.BeginHorizontal();

//列出脚本名称和“Find”按钮
GUILayout.Label(name);
bool click = GUILayout.Button("Find");
GUILayout.EndHorizontal();
GUILayout.Space(10);

//列出搜索结果
if (findResult != null && findResult.Count > 0)
{
    GUILayout.BeginScrollView(Vector2.zero, GUIStyle.none);
    foreach (string path in findResult)
    {
        GUILayout.Label(path);
    }
    GUILayout.EndScrollView();
}

if (click)
{
    Find(selectType);
}
GUILayout.EndVertical();

}

然后，实现Find方法，搜索指定Type的全部引用：

void Find(System.Type type){

//step 1:find ref in assets

//filter all GameObject from assets（so-called 'Prefab'）
var guids = AssetDatabase.FindAssets("t:GameObject");

findResult = new List();

var tp = typeof(GameObject);

foreach (var guid in guids)
{
    var path = AssetDatabase.GUIDToAssetPath(guid);

    //load Prefab
    var obj = AssetDatabase.LoadAssetAtPath(path, tp) as GameObject;

    //check whether prefab contains script with type 'type'
    if (obj != null)
    {
        var cmp = obj.GetComponent(type);
        if (cmp == null)
        {
            cmp = obj.GetComponentInChildren(type);
        }
        if (cmp != null)
        {
            findResult.Add(path);
        }
    }
}

//step 2: find ref in scenes

//save current scene
string curScene = EditorApplication.currentScene;
EditorApplication.SaveScene();

//find all scenes from dataPath
string[] scenes = Directory.GetFiles(Application.dataPath, "*.unity", SearchOption.AllDirectories);

//iterates all scenes 
foreach (var scene in scenes)
{
    EditorApplication.OpenScene(scene);

    //iterates all gameObjects
    foreach (GameObject obj in FindObjectsOfType<GameObject>())
    {
        var cmp = obj.GetComponent(type);
        if (cmp == null)
        {
            cmp = obj.GetComponentInChildren(type);
        }
        if (cmp != null)
        {
            findResult.Add(scene.Substring(Application.dataPath.Length) + "Assets:" + obj.name);
        }
    }
}

//reopen current scene
EditorApplication.OpenScene(curScene);
Debug.Log ("finish");

}

此时切换到Unity，在Project窗口选中一个scrpit，右键选择『Find All Reference』，在打开的窗口选择『Find』按钮，即可看到下面列出了所有引用了这个脚本的位置（如果项目过于庞大，可能需要等待一会儿）。

代码下载：[FindScriptRef.cs]({{ site.url }}/files/FindScriptRef.cs “FindScriptRef.cs”)