using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; using UnityEngine.EventSystems; public class InventoryManager : MonoBehaviour { public GameObject inventoryUI; public GameObject itemSlotPrefab; public Transform itemSlotContainer; public List<Item> items = new List<Item>(); public Dictionary<string, int> itemCounts = new Dictionary<string, int>(); private bool isInventoryOpen = false; using UnityEngine; [CreateAssetMenu(fileName = "New Item", menuName = "Inventory/Item")] public class Item : ScriptableObject { public new string name; public string description; public Sprite icon; } private void Start() { inventoryUI.SetActive(false); } private void Update() { if (Input.GetKeyDown(KeyCode.I)) { ToggleInventory(); } } public void AddItem(Item item) { items.Add(item); if (itemCounts.ContainsKey(item.name)) { itemCounts[item.name]++; } else { itemCounts[item.name] = 1; CreateItemSlot(item); } UpdateItemSlot(item); } public void RemoveItem(Item item) { items.Remove(item); if (itemCounts.ContainsKey(item.name)) { itemCounts[item.name]--; if (itemCounts[item.name] == 0) { itemCounts.Remove(item.name); DestroyItemSlot(item); } } UpdateItemSlot(item); } public void UpdateItemCount(Item item) { if (itemCounts.ContainsKey(item.name)) { itemCounts[item.name]--; UpdateItemSlot(item); } } public void ToggleInventory() { isInventoryOpen = !isInventoryOpen; inventoryUI.SetActive(isInventoryOpen); } private void CreateItemSlot(Item item) { GameObject itemSlot = Instantiate(itemSlotPrefab, itemSlotContainer); itemSlot.name = item.name; itemSlot.GetComponent<Image>().sprite = item.icon; } private void DestroyItemSlot(Item item) { Transform itemSlot = itemSlotContainer.Find(item.name); Destroy(itemSlot.gameObject); } private void UpdateItemSlot(Item item) { Transform itemSlot = itemSlotContainer.Find(item.name); Text itemText = itemSlot.GetComponentInChildren<Text>(); itemText.text = itemCounts[item.name].ToString(); } }

这段代码存在一些问题，其中一个问题是：

using UnityEngine;

这行代码应该放在文件开头的using语句之后，而不是在类定义之间。在C#中，using语句必须放在命名空间内的所有其他元素定义之前。

以下是修改后的代码：

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

public class InventoryManager : MonoBehaviour
{
    public GameObject inventoryUI;
    public GameObject itemSlotPrefab;
    public Transform itemSlotContainer;
    public List<Item> items = new List<Item>();
    public Dictionary<string, int> itemCounts = new Dictionary<string, int>();
    private bool isInventoryOpen = false;

    [CreateAssetMenu(fileName = "New Item", menuName = "Inventory/Item")]
    public class Item : ScriptableObject
    {
        public new string name;
        public string description;
        public Sprite icon;
    }

    private void Start()
    {
        inventoryUI.SetActive(false);
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.I))
        {
            ToggleInventory();
        }
    }

    public void AddItem(Item item)
    {
        items.Add(item);

        if (itemCounts.ContainsKey(item.name))
        {
            itemCounts[item.name]++;
        }
        else
        {
            itemCounts[item.name] = 1;
            CreateItemSlot(item);
        }

        UpdateItemSlot(item);
    }

    public void RemoveItem(Item item)
    {
        items.Remove(item);

        if (itemCounts.ContainsKey(item.name))
        {
            itemCounts[item.name]--;

            if (itemCounts[item.name] == 0)
            {
                itemCounts.Remove(item.name);
                DestroyItemSlot(item);
            }
        }

        UpdateItemSlot(item);
    }

    public void UpdateItemCount(Item item)
    {
        if (itemCounts.ContainsKey(item.name))
        {
            itemCounts[item.name]--;
            UpdateItemSlot(item);
        }
    }

    public void ToggleInventory()
    {
        isInventoryOpen = !isInventoryOpen;
        inventoryUI.SetActive(isInventoryOpen);
    }

    private void CreateItemSlot(Item item)
    {
        GameObject itemSlot = Instantiate(itemSlotPrefab, itemSlotContainer);
        itemSlot.name = item.name;
        itemSlot.GetComponent<Image>().sprite = item.icon;
    }

    private void DestroyItemSlot(Item item)
    {
        Transform itemSlot = itemSlotContainer.Find(item.name);
        Destroy(itemSlot.gameObject);
    }

    private void UpdateItemSlot(Item item)
    {
        Transform itemSlot = itemSlotContainer.Find(item.name);
        Text itemText = itemSlot.GetComponentInChildren<Text>();
        itemText.text = itemCounts[item.name].ToString();
    }
}

希望这个修改能够解决你的问题！