sked/Assets/Script/UI/HP Bar/HPBarBoss.cs

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

public class HPBarBoss : MonoBehaviour
{
    public Slider hpBar;
    public Image icon;

    Character boss;
    private void Start()
    {
        EventManager.Instance.Add("BossAppear", BossAppear);
    }
    private void OnDestroy()
    {
        EventManager.Instance.Remove("BossAppear", BossAppear);
    }
    public void BossAppear(object value)
    {
        boss = (Character)value;

        if (boss == null)
            gameObject.SetActive(false);
        else
        {
            boss.OnHit += OnHit;
            boss.OnDie += OnDie;

            hpBar.value = boss.HP / (float)boss.HP_Max;

            icon.sprite = SpriteManager.Instance.SpriteGet("AtlasIngame", $"bossIcon{boss.NAME}");

            gameObject.SetActive(true);
        }
    }
    private void OnDisable()
    {
        if (boss != null)
        {
            boss.OnHit -= OnHit;
            boss.OnDie -= OnDie;
        }

        boss = null;
    }

    void OnHit(Character attacker, Vector3 dir, float knockBackAddRate, bool MOTION_FORCE, System.Action OnEnd)
    {
        hpBar.value = boss.HP / (float)boss.HP_Max;
    }
    void OnDie(Character attacker, Vector3 dir)
    {
        gameObject.SetActive(false);
    }
}