目的

在Hierarchy视图中将所有挂有自定义脚本组件的游戏对象标记出来，如下图所示：所有挂有自定义脚本组件的游戏对象名称后面都有一个脚本图标。

用法

将下面的代码文件放在工程中的Editor目录下。

代码

FanShowMonoBehaviourInHierarchy.cs

using System.Net.Mime;
using System.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

[InitializeOnLoad]
public class FanShowMonoBehaviourInHierarchy
{
    public static bool EnableShowMonoBehaviourInHierarchy = true;
    public static bool ShouldModifyNameColor = false;
    public static bool ShouldShowIcon = true;

    public static Color TargetColor
    {
        get
        {
            return new Color(200/255f, 200/255f, 50/255f, 1f);
        }
    }

    static FanShowMonoBehaviourInHierarchy()
    {
        EditorApplication.hierarchyWindowItemOnGUI += ShowMonoBehaviourInHierarchy;
    }

    private static void ShowMonoBehaviourInHierarchy(int instanceId, Rect selectionRect)
    {
        if(!EnableShowMonoBehaviourInHierarchy)
        {
            return;
        }
        try
        {
            var rectCheck = new Rect(selectionRect);
            rectCheck.x += rectCheck.width - 20;
            rectCheck.width = 18;

            var obj = EditorUtility.InstanceIDToObject(instanceId);
            var go = (GameObject)obj;

            var color = TargetColor;
            if (!go.activeInHierarchy)
            {
                color.a = 0.5f;
            }

            var index = 0;
            GUIStyle style = null;
            if (ShouldModifyNameColor)
            {
                ModifyColor<MonoBehaviour>(selectionRect, go, color, ref index, ref style);
            }
            if (ShouldShowIcon)
            {
                DrawRectIcon<MonoBehaviour>(selectionRect, go, ref index, ref style);
            }

            if (style != null)
            {
                GUI.Label(selectionRect, go.name, style);
            }
        }
        catch(Exception)
        {}
    }

    private static void ModifyColor<T>(Rect selectionRect, GameObject go, Color textColor, 
    ref int order, ref GUIStyle style)where T:Component
    {
        if(go.HasComponent<T>(false))
        {
            if (EnableShowMonoBehaviourInHierarchy)
            {
                style = LabelStyle(textColor);
            }
        }
    }

    private static void DrawIcon<T>(Rect rect)
    {
        var icon = EditorGUIUtility.IconContent("cs Script Icon");
        GUI.Label(rect, icon);
    }

    private static Rect CreateRect(Rect selectionRect, int index)
    {
        var rect = new Rect(selectionRect);
        rect.x += rect.width - 20 - (20 * index);
        rect.width = 18;
        return rect;
    }

    private static void DrawRectIcon<T>(Rect selectionRect, GameObject go, ref int order,
                                        ref GUIStyle style) where T:Component
    {
        if (go.HasComponent<T>(false))
        {
            order += 1;
            var rect = CreateRect(selectionRect, order);   
            DrawIcon<T>(rect);
        }
    }

    private static GUIStyle LabelStyle(Color color)
    {
        var style = new GUIStyle(((GUIStyle)"Label"))
        {
            padding =
            {
                left = EditorStyles.label.padding.left + 17,
                top = EditorStyles.label.padding.top - 3
            },
            normal = 
            {
                textColor = color
            }
        };
        return style;
    }
}

public static class ExtensionMethods
{
    public static bool HasComponent<T>(this GameObject go, bool checkChildren)where T:Component
    {
        T temp = null;
        if (!checkChildren)
        {
            temp = go.GetComponent<T>();
        }
        else
        {
            temp = go.GetComponentsInChildren<T>().FirstOrDefault();
        }

        return temp != null && !(temp is UnityEngine.EventSystems.UIBehaviour);
    }
}