sked/Assets/Script/Map/MapEditor/ItemDropdown.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Serialization;
using UnityEngine.UI;

public class ItemDropdown : MonoBehaviour
{
    public Text txt;
    public Dropdown dropdown;

    public void OnInitialized<T>(string str, UnityAction<ItemDropdown> OnChanged)
    {
        txt.text = $"{str}";
        if (OnChanged != null)
            OnValueChanged.AddListener(OnChanged);

        Util.DropDownList<T>.DropList(dropdown, 0);

        dropdown.onValueChanged.AddListener(ToggleChanged);
    }
    [System.Serializable]
    public class ValueChangedEvent : UnityEvent<ItemDropdown> { }
    [FormerlySerializedAs("onValueChanged")]
    [Space(10)]
    [SerializeField]
    private ValueChangedEvent OnValueChanged = new ValueChangedEvent();
    void ToggleChanged(int value)
    {
        OnValueChanged.Invoke(this);
    }
}