Unity 背包系统-数据持久化（继承ScriptableObject）

 1、UML图

 背包数据类

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

[CreateAssetMenu(fileName = "New Item",menuName ="Inventory/New Item")]
public class Item : ScriptableObject
{
    public string itemName;//名
    public Sprite itemSprite;//精灵图
    public int itemHeld;//持有个数
    [TextArea] 
    public string itemInfo;//描述

    public bool equip;
}

 背包库存类

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

[CreateAssetMenu(fileName ="New Item", menuName = "Inventory/New Inventory")]
public class Inventory : ScriptableObject
{
    public List<Item> itemList = new List<Item>();
}

格子类

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

public class Slot : MonoBehaviour
{
    public int SlotID;//空格ID 等于 物品ID
    public Image slotImage;
    public Text slotNum;
    public string slotInfo;

    public GameObject itemInSlot;

    public void ItemOnClicked()
    {
        InventoryManager.UpdateItemInfo(slotInfo);
    }

    public void SetupSlot(Item item)
    {
        if (item == null)
        {
            itemInSlot.SetActive(false);
            return;
        }
        slotImage.sprite = item.itemSprite;
        slotNum.text = item.itemHeld.ToString();
        slotInfo = item.itemInfo;
        
    }
}

 库存管理类

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

public class InventoryManager : MonoBehaviour
{
    static InventoryManager instance;

    public Inventory myBag;
    public GameObject slotGrid;
    //public Slot slotPrefab;
    public Text itemInformation;
    public GameObject EmptySlot;
    public List<GameObject> slots = new List<GameObject>();

    private void Awake()
    {
        if (instance != null)
            Destroy(this);
        instance = this;
    }

    private void OnEnable()
    {
        RefreshItem();
        instance.itemInformation.text = "";
    }

    public static void UpdateItemInfo(string itemDescription)
    {
        instance.itemInformation.text = itemDescription;
    }

    //public static void CreateNewItem(Item item)
    //{
    //    Slot newItem = Instantiate(instance.slotPrefab, instance.slotGrid.transform.position, Quaternion.identity);
    //    newItem.gameObject.transform.SetParent(instance.slotGrid.transform);
    //    newItem.slotItem = item;
    //    newItem.slotImage.sprite = item.itemSprite;
    //    newItem.slotNum.text = item.itemHeld.ToString();
    //}

    public static void RefreshItem()
    {
        //循环删除slotGrid下的子集物体
        for (int i = 0; i < instance.slotGrid.transform.childCount; i++)
        {
            if (instance.slotGrid.transform.childCount == 0) break;
            Destroy(instance.slotGrid.transform.GetChild(i).gameObject);
            instance.slots.Clear();
        }
        //重新生成对应myBag里面的物体的slot
        for (int i = 0; i < instance.myBag.itemList.Count; i++)
        {
            //CreateNewItem(instance.myBag.itemList[i]);
            instance.slots.Add(Instantiate(instance.EmptySlot));
            instance.slots[i].transform.SetParent(instance.slotGrid.transform);
            instance.slots[i].GetComponent<Slot>().SlotID = i;
            instance.slots[i].GetComponent<Slot>().SetupSlot(instance.myBag.itemList[i]);
        }
    }
}

游戏世界物品管理类

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

public class ItemOnWorld : MonoBehaviour
{
    public Item thisItem;
    public Inventory playerInventory;

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.CompareTag("Player"))
        {
            AddNewItem();
            Destroy(gameObject);
        }
    }

    private void AddNewItem()
    {
        if (!playerInventory.itemList.Contains(thisItem))
        {
            //playerInventory.itemList.Add(thisItem);
            //InventoryManager.CreateNewItem(thisItem);
            for (int i = 0; i < playerInventory.itemList.Count; i++)
            {
                if (playerInventory.itemList[i] == null)
                {
                    playerInventory.itemList[i] = thisItem;
                    break;
                }
            }
        }
        else
        {
            thisItem.itemHeld += 1;
        }

        InventoryManager.RefreshItem();
    }
}

背包内物体管理类

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

public class ItemOnDrag : MonoBehaviour,IBeginDragHandler,IDragHandler,IEndDragHandler
{
    public Transform originalParent;
    public Inventory myBag;
    private int currentItemID;//当前物品ID
    public void OnBeginDrag(PointerEventData eventData)
    {
        originalParent = transform.parent;
        currentItemID = originalParent.GetComponent<Slot>().SlotID;
        transform.SetParent(transform.parent.parent);
        transform.position = eventData.position;
        GetComponent<CanvasGroup>().blocksRaycasts = false;
    }

    public void OnDrag(PointerEventData eventData)
    {
        transform.position = eventData.position;
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        if (eventData.pointerCurrentRaycast.gameObject != null)
        {
            if (eventData.pointerCurrentRaycast.gameObject.name == "ItemImage")//判断下面物体名字是：ItemImage 那么互换位置
            {
                transform.SetParent(eventData.pointerCurrentRaycast.gameObject.transform.parent.parent);
                transform.position = eventData.pointerCurrentRaycast.gameObject.transform.parent.parent.position;
                //itemList的物品存储位置改变
                var temp = myBag.itemList[currentItemID];
                myBag.itemList[currentItemID] = myBag.itemList[eventData.pointerCurrentRaycast.gameObject.GetComponentInParent<Slot>().SlotID];
                myBag.itemList[eventData.pointerCurrentRaycast.gameObject.GetComponentInParent<Slot>().SlotID] = temp;
                eventData.pointerCurrentRaycast.gameObject.transform.parent.position = originalParent.position;
                eventData.pointerCurrentRaycast.gameObject.transform.parent.SetParent(originalParent);
                GetComponent<CanvasGroup>().blocksRaycasts = true;//射线阻挡开启，不然无法再次选中移动的物体
                return;
            }
            if (eventData.pointerCurrentRaycast.gameObject.name == "Slot(Clone)")
            {
                //否则直接挂载检测到Slot下面
                transform.SetParent(eventData.pointerCurrentRaycast.gameObject.transform);
                transform.position = eventData.pointerCurrentRaycast.gameObject.transform.position;
                //itemLIst的物品存储位置改变
                myBag.itemList[eventData.pointerCurrentRaycast.gameObject.GetComponentInParent<Slot>().SlotID] = myBag.itemList[currentItemID];
                //解决自己放在自己位置的问题
                if (eventData.pointerCurrentRaycast.gameObject.GetComponent<Slot>().SlotID != currentItemID)
                {
                    myBag.itemList[currentItemID] = null;
                }
                GetComponent<CanvasGroup>().blocksRaycasts = true;
                return;
            }
        }
        //其他任何位置都归位物品
        transform.SetParent(originalParent);
        transform.position = originalParent.position;
        GetComponent<CanvasGroup>().blocksRaycasts = true;
    }
}

移动背包类

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

public class MoveBag : MonoBehaviour, IDragHandler
{
    public Canvas canvas;
    RectTransform currentRect;

    private void Awake()
    {
        currentRect = GetComponent<RectTransform>();
    }
    public void OnDrag(PointerEventData eventData)
    {
        currentRect.anchoredPosition += eventData.delta;
    }
}