[Part 5] Hand Slot Image not change to axe in playtest

[20_Nguyễn Hoàng Long]

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I’m working my way up to “1b. Adding functionality to Tool Hand Slot” but I’m having this problem. If I change “Equipped Tool” to Axe before pressing Play, “Hand Slot” will show Axe, but if I press Play first and change “Equipped Tool” to Axe, “Hand Slot” won’t change at all. There are no errors in the console.

If I change “Equipped Tool” to Axe before pressing Play, “Hand Slot” will show Axe.

If I press Play first and change “Equipped Tool” to Axe, “Hand Slot” won’t change at all.

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UIManager.cs

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

public class UIManager : MonoBehaviour
{
    public static UIManager Instance { get; private set; }
    [Header("Status Bar")]
    //Tool equip slot on the status bar
    public Image toolEquipSlot;



    [Header("Inventory System")]
    //The inventory panel
    public GameObject inventoryPanel;

    //The tool slot UIs
    public InventorySlot[] toolSlots;

    //The item slot UIs
    public InventorySlot[] itemSlots;

    //Item info box
    public Text itemNameText;
    public Text itemDescriptionText;

    private void Awake()
    {
        //If there is more than one instance, destroy the extra
        if (Instance != null && Instance != this)
        {
            Destroy(this);
        }
        else
        {
            //Set the static instance to this instance
            Instance = this;
        }
    }

    private void Start()
    {
        RenderInventory();
    }

    //Render the inventory screen to reflect the Player's Inventory. 
    public void RenderInventory()
    {
        //Get the inventory tool slots from Inventory Manager
        ItemData[] inventoryToolSlots = InventoryManager.Instance.tools;

        //Get the inventory item slots from Inventory Manager
        ItemData[] inventoryItemSlots = InventoryManager.Instance.items;

        //Render the Tool section
        RenderInventoryPanel(inventoryToolSlots, toolSlots);

        //Render the Item section
        RenderInventoryPanel(inventoryItemSlots, itemSlots);

        //Get Tool Equip from InventoryManager
        ItemData equippedTool = InventoryManager.Instance.equippedTool;

        //Check if there is an item to display
        if (equippedTool != null)
        {
            //Switch the thumbnail over
            toolEquipSlot.sprite = equippedTool.thumbnail;

            toolEquipSlot.gameObject.SetActive(true);

            return;
        }

        toolEquipSlot.gameObject.SetActive(false);


    }

    //Iterate through a slot in a section and display them in the UI
    void RenderInventoryPanel(ItemData[] slots, InventorySlot[] uiSlots)
    {
        for (int i = 0; i < uiSlots.Length; i++)
        {
            //Display them accordingly
            uiSlots[i].Display(slots[i]);
        }
    }

    public void ToggleInventoryPanel()
    {
        //If the panel is hidden, show it and vice versa
        inventoryPanel.SetActive(!inventoryPanel.activeSelf);

        RenderInventory();
    }

    //Display Item info on the Item infobox
    public void DisplayItemInfo(ItemData data)
    {
        //If data is null, reset
        if (data == null)
        {
            itemNameText.text = "";
            itemDescriptionText.text = "";

            return;
        }

        itemNameText.text = data.name;
        itemDescriptionText.text = data.description;
    }

}

InventoryManager.cs

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

public class InventoryManager : MonoBehaviour
{
    public static InventoryManager Instance { get; private set; }

    private void Awake()
    {
        //If there is more than one instance, destroy the extra
        if (Instance != null && Instance != this)
        {
            Destroy(this);
        }
        else
        {
            //Set the static instance to this instance
            Instance = this;
        }
    }

    [Header("Tools")]
    //Tool Slots
    public ItemData[] tools = new ItemData[8];
    //Tool in the player's hand
    public ItemData equippedTool = null;

    [Header("Items")]
    //Item Slots
    public ItemData[] items = new ItemData[8];
    //Item in the player's hand
    public ItemData equippedItem = null;

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {

    }
}

[Terence]

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Unflagged your message as spam. Sorry about this! @jonathan will be getting back to you on this soon.

[Tarha Apustaja]

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Based on the reference information and the code provided, the issue is likely that the RenderInventory() method is only called in the Start() method of UIManager. To ensure the UI updates when equippedTool changes after play mode begins, you should call RenderInventory() whenever the equipped tool changes.

The reference tutorial suggests calling UIManager.Instance.RenderInventory() after changing the equipped item/tool. So in your InventoryManager, you would want to call UIManager.Instance.RenderInventory() after setting equippedTool.

However, the exact solution is NOT_FOUND in the provided reference information. The tutorial snippet does not explicitly address this specific UI update scenario.

[Jonathan Teo]

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Looks like the AI assistant has identified the problem. The reason why it doesn’t automatically update is because RenderInventory is not called. Simply follow the tutorial to the end and you should be fine. We call them at the InventoryToHand function.

Every time you make a change to the Inventory you have to call that function or it will not show.

[Author]

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