Alex教程每一P的教程原代码加上我自己的理解初步理解写的注释，可供学习Alex教程的人参考
此代码仅为较上一P有所改变的代码

【Unity教程】从0编程制作类银河恶魔城游戏_哔哩哔哩_bilibili

UI_CraftList.cs

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

public class UI_CraftList : MonoBehaviour,IPointerDownHandler
{
    
    [SerializeField] private GameObject craftSlotPrefab;//创建craftSlot的预制体
    [SerializeField] private List<ItemData_Equipment> craftEquipment;//一个将要导进craftList的data类型组
    [SerializeField] private Transform craftSlotParent;//便于寻找将要删除的craftSlot的父组件
    [SerializeField] private List<UI_CraftSlot> craftSlots;//暂时保存将要删除的craftSlot

    private void Start()
    {
        AssignCraftSlots();
    }

    private void AssignCraftSlots()//获得当前所有的craftSlot函数//主要用来为清空做准备
    {
        for (int i = 0; i < craftEquipment.Count; i++)
        {
            craftSlots.Add(craftSlotParent.GetChild(i).GetComponent<UI_CraftSlot>());
        }
    }

    public void SetupCraftList()//将所有保存在其中的装备类型实例化craftslot并存入CraftList的函数
    {
        AssignCraftSlots();

        for (int i = 0; i < craftSlots.Count;i++)//删除所有原来存在于其list里的slot
        {
            Destroy(craftSlots[i].gameObject);
            Debug.Log(1);
        }

        craftSlots = new List<UI_CraftSlot>();//清空此槽，方便下一次装其他的装备

        for(int i = 0;i < craftEquipment.Count;i++)
        {
            GameObject newSlot = Instantiate(craftSlotPrefab, craftSlotParent);//创建的实例往craftPartent里塞
            newSlot.GetComponent<UI_CraftSlot>().SetUpCraftSlot(craftEquipment[i]);
        }
        
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        SetupCraftList();
    }
}

UI_CraftSlot.cs

using UnityEngine.EventSystems;

public class UI_CraftSlot : UI_itemSlot
{
    protected override void Start()
    {
        base.Start();


    }

    public void SetUpCraftSlot(ItemData_Equipment _data)//设置CraftSlot的公开函数
    {
        if (_data == null)
            return;
        item.data = _data;
        itemImage.sprite = _data.icon;
        itemText.text = _data.name;

       
    }
    private void OnValidate()
    {
        //UpdateSlots(item);
    }

    public override void OnPointerDown(PointerEventData eventData)
    {
        ItemData_Equipment craftData = item.data as ItemData_Equipment;

        Inventory.instance.CanCraft(craftData, craftData.craftingMaterials);

    }
}