인프런 커뮤니티 질문&답변

using UnityEngine;
using UnityEngine.UI;

public class ItemPurchase : MonoBehaviour
{
    [SerializeField] UnitObject[] unitObjects;
    [SerializeField] int ItemNumber;
    [SerializeField] int ItemPrice;
    [SerializeField] GameObject BlackPanel;
    [SerializeField] GameObject PurchasePanel;
    [SerializeField] GameObject AlarmPanel;
    [SerializeField] Text AlarmText;
    [SerializeField] Text UnitName;
    [SerializeField] Image UnitImg;
    
    int CurrentCoin = 0;

    [HideInInspector] public static ItemPurchase Instance;

    void Awake()
    {
        Instance = this;
        Debug.Log("1. Saved ItemNumber" + PlayerPrefs.GetInt("ItemNumber"));

    }

    void Start()
    {
        PlayerPrefs.SetInt("Coin", 10000000);
        PlayerPrefs.Save();
        Debug.Log("2. Saved ItemNumber" + PlayerPrefs.GetInt("ItemNumber"));
        CurrentCoin = PlayerPrefs.GetInt("Coin");
    }

    public void SelectItem()
    {
        PlayerPrefs.SetInt("ItemNumber", ItemNumber);
        PlayerPrefs.Save();

        BlackPanel.SetActive(true);
        PurchasePanel.SetActive(true);

        UnitName.text = unitObjects[ItemNumber-1].UnitName;
        UnitImg.sprite = unitObjects[ItemNumber-1].UnitImg;
        Debug.Log("3. Saved ItemNumber" + PlayerPrefs.GetInt("ItemNumber"));
        Debug.Log("4. Selected Item Number : " + ItemNumber);
    }

    public void PurchaseItemBtn()
    {
        if(CurrentCoin < ItemPrice)
        {
            AlarmPanel.SetActive(true);
            AlarmText.text = "코인이 부족합니다.";
            return;
        }

        AlarmPanel.SetActive(true);
        AlarmText.text = "구매를 완료했습니다.";


        Debug.Log("5. Saved ItemNumber" + PlayerPrefs.GetInt("ItemNumber"));
        Debug.Log("6. Selected Unit" + (ItemNumber+3));
        Debug.Log("7. Selected Price : " + ItemPrice);
        PlayerPrefs.SetInt("Unit"+(ItemNumber + 3), 1);
        PlayerPrefs.SetInt("Coin", CurrentCoin - ItemPrice);

        PlayerPrefs.Save();

    }

    public void PurchasePanelOffBtn()
    {
        BlackPanel.SetActive(false);
        PurchasePanel.SetActive(false);

        PlayerPrefs.DeleteKey("ItemNumber");
    }
}

using UnityEngine;
using UnityEngine.UI;

public class PurchaseBtn : MonoBehaviour
{
    [SerializeField] Button purchase_btn;
    
    void Start()
    {
        purchase_btn.onClick.AddListener(OnClickBtn);
    }

    private void OnClickBtn()
    {
        ItemPurchase.Instance.PurchaseItemBtn();
    }
}

강의 따라했는데, 나이트 구매시 인스턴스 this가 super defender로 잡혀서 구매가 되는데 어떻게 해야하나요? 싱글턴 패턴에서 수퍼 디펜더가 처음에 잡혀서 나이트가 static 인스턴스에의해 못 잡고있는 것 같기도한데... 어디서부터 봐야할지 모르겠어요ㅠ