Unity 获取Editor中的内置图标

using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

namespace XRL
{
    public sealed class GUIIcon : EditorWindow
    {
        [MenuItem("XRL/Open GUIIcon")]
        private static void OpenGUIIcon()
        {
            icons = new List<Texture>(Resources.FindObjectsOfTypeAll<Texture>());
            GetWindow<GUIIcon>().Show();
        }

        private Vector2 scrollPosition;
        private static List<Texture> icons;
        private string searchContent = "";
        private const float width = 50f;
        private void OnGUI()
        {
            GUILayout.BeginHorizontal("Toolbar");
            {
                GUILayout.Label("Search:", GUILayout.Width(50));
                searchContent = GUILayout.TextField(searchContent, "SearchTextField");
            }
            GUILayout.EndHorizontal();
            scrollPosition = GUILayout.BeginScrollView(scrollPosition);
            {
                List<string> matchNames = new List<string>();
                for (int i = 0; i < icons.Count; i++)
                {
                    if (!icons[i].name.Equals(string.Empty) && icons[i].name.ToLower().Contains(searchContent.ToLower()))
                    {
                        matchNames.Add(icons[i].name);
                    }
                }
                int count = Mathf.RoundToInt(position.width / (width + 3f));
                for (int i = 0; i < matchNames.Count; i += count)
                {
                    GUILayout.BeginHorizontal();
                    for (int j = 0; j < count; j++)
                    {
                        int index = i + j;
                        if (index < matchNames.Count)
                        {
                            if (GUILayout.Button(EditorGUIUtility.IconContent(matchNames[index]), GUILayout.Width(width), GUILayout.Height(30)))
                            {
                                EditorGUIUtility.systemCopyBuffer = matchNames[index];
                                Debug.Log(matchNames[index]);
                            }
                        }
                    }
                    GUILayout.EndHorizontal();
                }
            }
            GUILayout.EndScrollView();
        }
    }
}