Type Filter Attribute特性：对输入的value 进行自定义过滤，只显示需要的类型

完整示例代码

using Sirenix.OdinInspector;
using Sirenix.Utilities;
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

public class TypeFilterExample : MonoBehaviour
{
    [ShowInInspector]
    [TypeFilter("GetFilteredTypeList")]
    public BaseClass A, B;

    [ShowInInspector]
    [TypeFilter("GetFilteredTypeList")]
    public BaseClass[] Array = new BaseClass[3];

    public IEnumerable<Type> GetFilteredTypeList()
    {
        var q = typeof(BaseClass).Assembly.GetTypes()
            .Where(x => !x.IsAbstract)                                          // 不包括 BaseClass
            .Where(x => !x.IsGenericTypeDefinition)                             // 不包括 C1<>
            .Where(x => typeof(BaseClass).IsAssignableFrom(x));                 // 排除不从BaseClass继承的类 

        // Adds various C1<T> type variants.
        q = q.AppendWith(typeof(C1<>).MakeGenericType(typeof(GameObject))); //添加C1泛型为GameObject 的value
        q = q.AppendWith(typeof(C1<>).MakeGenericType(typeof(AnimationCurve)));//添加C1泛型为AnimationCurve 的value
        q = q.AppendWith(typeof(C1<>).MakeGenericType(typeof(List<float>)));//添加C1泛型为List<float> 的value

        return q;
    }

    public abstract class BaseClass
    {
        public int BaseField;
    }

    public class A1 : BaseClass { public int _A1; }
    public class A2 : A1 { public int _A2; }
    public class A3 : A2 { public int _A3; }
    public class B1 : BaseClass { public int _B1; }
    public class B2 : B1 { public int _B2; }
    public class B3 : B2 { public int _B3; }
    public class C1<T> : BaseClass { public T C; }
}

更多教程内容详见：革命性Unity 编辑器扩展工具 — Odin Inspector 系列教程