daluandou/Assets/Script/SummonCardButton.cs

using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Button))]
public class SummonCardButton : MonoBehaviour
{
    [Min(1)]
    public int summonSlot = 1;

    private Button button;
    private MainCharacterCombat combat;

    private void Awake()
    {
        button = GetComponent<Button>();
        combat = FindObjectOfType<MainCharacterCombat>();
        button.onClick.AddListener(OnClick);
    }

    private void OnDestroy()
    {
        if (button != null)
        {
            button.onClick.RemoveListener(OnClick);
        }
    }

    public void OnClick()
    {
        if (combat == null)
        {
            combat = FindObjectOfType<MainCharacterCombat>();
        }

        if (combat != null)
        {
            combat.RequestSummon(summonSlot);
        }
    }
}