Unity Editor knowledge point sorting (create custom Inspector 2)

Level script code

using UnityEngine;

namespace RunAndJump {
    
    
	public partial class Level : MonoBehaviour {
    
    
		[SerializeField]
		public int _totalTime = 60;
		[SerializeField]
		private float _gravity = -30;
		[SerializeField]
		private AudioClip _bgm;
		[SerializeField]
		private Sprite _background;

        [SerializeField]
        private int _totalColumns = 25; //网格列数
        [SerializeField]
        private int _totalRows = 10;  //网格行数
        public const float GridCellSize = 1.28f; //网格单元大小
        private readonly Color _normalColor = Color.grey; //正常网格颜色
        private readonly Color _selectedlColor = Color.yellow; //选中之后网格颜色

        [SerializeField]
        private LevelPiece[] _pieces;

        public int TotalTime {
    
    
			get {
    
     return _totalTime; }
			set {
    
     _totalTime = value; }
		}

		public float Gravity {
    
    
			get {
    
     return _gravity; }
			set {
    
     _gravity = value; }
		}

		public AudioClip Bgm {
    
    
			get {
    
     return _bgm;}
			set {
    
     _bgm = value; }
		}

		public Sprite Background {
    
    
			get {
    
     return _background; }
			set {
    
     _background = value; }
		}

        public int TotalColumns
        {
    
    
            get {
    
     return _totalColumns; }
            set {
    
     _totalColumns = value; }
        }

        public int TotalRows
        {
    
    
            get {
    
     return _totalRows; }
            set {
    
     _totalRows = value; }
        }

        public LevelPiece[] Pieces
        {
    
    
            get {
    
     return _pieces; }
            set {
    
     _pieces = value; }
        }
}

Custom Inspector Code

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

namespace RunAndJump
{
    
    
    [CustomEditor(typeof(Level))]
    public class LevelInspector : Editor
    {
    
    
        private Level _myTarget;

        //在我们对象被选中的时候调用的，常常用于一些初始化的代码
        private void OnEnable()
        {
    
    
            Debug.Log("OnEnable");
            //为哪个对象写查看器 target就是哪个对象
            //target的类型 是Object，需要转换类型
            _myTarget = (Level)target;
        }

        //在对象超出我们操作范围内调用的
        //在对象被销毁的时候调用的
        //可以用来做一些代码退出前的清理工作（数组清零，变量重置）
        private void OnDisable()
        {
    
    
            Debug.Log("OnDisable");
        }

        //在对象被销毁的时候调用的
        private void OnDestroy()
        {
    
    
            Debug.Log("OnDestroy");
        }

        //绘制查看器GUI的回调函数
        //必须是public，为了使自定义的查看起生效 必须重载
        public override void OnInspectorGUI()
        {
    
    
            //查看器输出文本
            EditorGUILayout.LabelField("这个inspector的GUI被修改了");

            //绘制查看器默认效果
            //DrawDefaultInspector();     

            //绘制自定义查看器效果
            DrawLevelDataGUI();
        }

        private void DrawLevelDataGUI()
        {
    
    
            //EditorGUI 和 EditorGUILayout 的主要区别是，EditorGUI需要指定绘制区域，EditorGUILayout会自适应

            //绘制标题 样式为加粗
            EditorGUILayout.LabelField("Data",EditorStyles.boldLabel);

            //绘制整形域 并且关卡时间要大于0
            //赋值的原因是 当整形域的里输入的值修改的时候 会使用该值的新的值做判断
            _myTarget.TotalTime = EditorGUILayout.IntField("TotalTime",Mathf.Max(0,_myTarget.TotalTime));

            //绘制浮点域
            _myTarget.Gravity = EditorGUILayout.FloatField("Gravity", _myTarget.Gravity);

            //绘制对象域
            //true的含义是 是否允许场景中的对象添加进来
            //ObjectField的返回值就是Object 需要进行类型转换
            //背景音乐
            _myTarget.Bgm = (AudioClip)EditorGUILayout.ObjectField("BGM", _myTarget.Bgm , typeof(AudioClip) , false);
            //背景图片
            _myTarget.Background = (Sprite)EditorGUILayout.ObjectField("Background", _myTarget.Background, typeof(Sprite), false);
        }
    }
}

After the code is executed, the effect is as follows