aibis-dream/Assets/Editor/EditorKit.cs

using UnityEditor;
using UnityEngine;

namespace AibisDream.SystemEditor
{
    public static class EditorKit
    {
        public static readonly GUIStyle BoldFont = new(EditorStyles.label)
        {
            fontStyle = FontStyle.Bold
        };

        public static int SortingLayerField(string label, int id)
        {
            // 先获取layer
            var layers = GetSortingLayerNames();
            // 将ID转为idx
            var idx = TransSortingLayer2Idx(id);

            var newIdx = EditorGUILayout.Popup(label, idx, layers);
            
            return TransIdx2SortingLayer(newIdx);
        }

        private static string[] GetSortingLayerNames()
        {
            // 获取所有 Sorting Layer 名称
            var layerCount = SortingLayer.layers.Length;
            var sortingLayerNames = new string[layerCount];
            for (var i = 0; i < layerCount; i++)
            {
                sortingLayerNames[i] = SortingLayer.layers[i].name;
            }
            return sortingLayerNames;
        }

        private static int TransSortingLayer2Idx(int id)
        {
            var layers = SortingLayer.layers;
            for (var i = 0; i < layers.Length; i++)
            {
                if (layers[i].id == id) return i;
            }

            return 0;
        }

        private static int TransIdx2SortingLayer(int idx)
        {
            if (idx < 0 || idx >= SortingLayer.layers.Length)
            {
                return SortingLayer.layers[0].id;
            }

            return SortingLayer.layers[idx].id;
        }
    }
}