garden_client/Assets/Script/Social/CustomSlider.cs

using System;
using System.Collections;
using System.Collections.Generic;

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class CustomSlider : Slider
{
    #region Config

    public Action onPointerUp;
    public Action onPointerDown;

    #endregion

    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        onPointerDown.SafeInvoke();
    }

    public override void OnPointerUp(PointerEventData eventData)
    {
        base.OnPointerUp(eventData);
        onPointerUp.SafeInvoke();
    }
}