Virtual Currency Shop Tutorial – Part 2 (Code)

This post contains all the code that’s been written in the YouTube video.

You can read it at your own pace, although watching the video prior to looking at this code example is recommended.

ShopManagerScript.cs

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

public class ShopManagerScript : MonoBehaviour {

    [SerializeField]
    private Transform[] shopBtns;

    public Text CoinsTxt, SelectedItemTxt;
    public Color SelectedColor, NonSelectedColor;

    private int prevSelectedIndex;

    private void Start()
    {
        for (int i = 0; i < shopBtns.Length; i++)
        {
            shopBtns[i].GetChild(0).GetComponent<Text>().text = Inventory.Items[i].Name;
        }

        UpdateUI();
    }

    public void BuyOrSelectItem(int index)
    {
        if (Inventory.Items[index].Bought)
            Inventory.Instance.SelectItem(index);
        else
            Inventory.Instance.BuyItem(index);

        UpdateUI();
    }

    private void UpdateUI()
    {
        CoinsTxt.text = "Coins: " + Inventory.Coins.ToString();
        SelectedItemTxt.text = Inventory.Items[Inventory.SelectedItemIndex].Name;

        shopBtns[prevSelectedIndex].GetComponent<Image>().color = NonSelectedColor;
        shopBtns[Inventory.SelectedItemIndex].GetComponent<Image>().color = SelectedColor;

        prevSelectedIndex = Inventory.SelectedItemIndex;
    }
}