Unity类银河恶魔城学习记录12-9，10 p131 Improve Item ToolTip，P132 Merge Skill Tree UI with Skill Manager源代码

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_itemSlot.cs

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

public class UI_itemSlot : MonoBehaviour ,IPointerDownHandler, IPointerEnterHandler, IPointerExitHandler
{
    [SerializeField] protected Image itemImage;
    [SerializeField] protected TextMeshProUGUI itemText;

    protected UI ui;

    public InventoryItem item;

    protected virtual void Start()
    {
        ui = GetComponentInParent<UI>();
    }

    public void UpdateSlots(InventoryItem _newItem)
    {
        item = _newItem;

        itemImage.color = Color.white;

        if (item != null)
        {
            itemImage.sprite = item.data.icon;

            if (item.stackSize > 1)
            {
                itemText.text = item.stackSize.ToString();

            }
            else
            {
                itemText.text = "";
            }
        }
    }

    public void CleanUpSlot()//解决出现UI没有跟着Inventory变化的bug
    {
        item = null;

        itemImage.sprite = null;
        itemImage.color = Color.clear;

        itemText.text = "";
    }

    public virtual void OnPointerDown(PointerEventData eventData)
    {
        if(item == null)//修复点击空白处会报错的bug
        {
            return;
        }

        if(Input.GetKey(KeyCode.LeftControl))
        {
            Inventory.instance.RemoveItem(item.data);
            ui.itemToolTip.HideToolTip();
            return;
        }

        if (item.data.itemType == ItemType.Equipment)
            Inventory.instance.EquipItem(item.data);

        ui.itemToolTip.HideToolTip();//修复已经装备了装备还会出现详细信息栏的bug
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        if (item == null || item.data == null)
            return;

        //给装备描述窗口以跟着鼠标移动的功能
        Vector2 mousePosition = Input.mousePosition;

        float xOffset = 0;
        float yOffset = 0;

        if (mousePosition.x > 600)
        {
            xOffset = -75;
        }
        else
        {
            xOffset = 75;
        }
        if (mousePosition.y > 320)
        {
            yOffset = -75;
        }
        else
        {
            yOffset = 75;
        }

        
        ui.itemToolTip.ShowToolTip(item.data as ItemData_Equipment);
        ui.itemToolTip.transform.position = new Vector2(mousePosition.x + xOffset, mousePosition.y + yOffset);
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (item == null || item.data == null)
            return;

        ui.itemToolTip.HideToolTip();
    }
}

ItemData_Equipment.cs

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

public enum EquipmentType
{
    Weapon,
    Armor,
    Amulet,
    Flask

}

[CreateAssetMenu(fileName = "New Item Data", menuName = "Data/Equipment")]
public class ItemData_Equipment : ItemData
{
    public EquipmentType equipmentType;

    [Header("Unique effect")]
    public float itemCooldown;
    public ItemEffect[] itemEffects;

    [TextArea]
    public string itemEffectDescription;//给装备加上独特的描述





    [Header("Major stats")]
    public int strength; // 力量 增伤1点 爆伤增加 1% 物抗
    public int agility;// 敏捷 闪避 1% 闪避几率增加 1%
    public int intelligence;// 1 点 魔法伤害 1点魔抗 
    public int vitality;//加血的

    [Header("Offensive stats")]
    public int damage;
    public int critChance;      // 暴击率
    public int critPower;       //150% 爆伤

    [Header("Defensive stats")]
    public int health;
    public int armor;
    public int evasion;//闪避值
    public int magicResistance;

    [Header("Magic stats")]
    public int fireDamage;
    public int iceDamage;
    public int lightingDamage;

    [Header("Craft requirements")]
    public List<InventoryItem> craftingMaterials;
    public int descriptionLength;

    public void AddModifiers()
    {
        PlayerStats playerStats = PlayerManager.instance.player.GetComponent<PlayerStats>();
        playerStats.strength.AddModifier(strength);
        playerStats.agility.AddModifier(agility);
        playerStats.intelligence