sked/Assets/Script/Common/UI/ButtonPress.cs

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

public class ButtonPress : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler, IPointerClickHandler
{
    [Serializable]
    public class ButtonEvent : UnityEvent { }

    [FormerlySerializedAs("onPressDown")]
    [SerializeField]
    private ButtonEvent m_OnPressDown = new ButtonEvent();
    public ButtonEvent onPressDown
    {
        get { return m_OnPressDown; }
        set { m_OnPressDown = value; }
    }
    public void OnPointerEnter(PointerEventData eventData)
    {
        m_OnPressDown.Invoke();
    }

    [FormerlySerializedAs("onPressUp")]
    [SerializeField]
    private ButtonEvent m_OnPressUp = new ButtonEvent();
    public ButtonEvent OnPressUp
    {
        get { return m_OnPressUp; }
        set { m_OnPressUp = value; }
    }
    public void OnPointerExit(PointerEventData eventData)
    {
        m_OnPressUp.Invoke();
    }

    [FormerlySerializedAs("onClick")]
    [SerializeField]
    private ButtonEvent m_OnClick = new ButtonEvent();
    public ButtonEvent OnClick
    {
        get { return m_OnClick; }
        set { m_OnClick = value; }
    }
    public void OnPointerClick(PointerEventData eventData)
    {
        OnClick.Invoke();
    }
}