Shopping for Weapons - Mastering Unity 2D Game Development - page 382

Tip
If you wish, you can define ShopManager as a singleton. However, unlike the
singletons used so far, this shop will need to be destroyed when the scene is unloaded.
Otherwise, you will always get the same shop. This is unless you also change how we
load the shop.
With the ShopManager set up, we can now create the missing definition for
ShopSlot. This will define the slots in the shop that remember what is being stored on
the shelf. Create a new script in Assets\Scripts\Shop and name it ShopSlot re-
placing its contents with the following code:
using UnityEngine;
public class ShopSlot : MonoBehaviour {
public InventoryItem Item;
public ShopManager Manager;
}
Now, to add other functions for the shop slots that will be used by the manager, add the
following functions to the ShopSlot script:
public void AddShopItem(InventoryItem item)
{
var spriteRenderer = GetComponent<SpriteRenderer>();
spriteRenderer.sprite = item.Sprite;
spriteRenderer.transform.localScale = item.Scale;
Item = item;
}
public void PurchaseItem()
{
GameState.currentPlayer.Inventory.Add(Item);
Item = null;
var spriteRenderer = GetComponent<SpriteRenderer>();
spriteRenderer.sprite = null;
Manager.ClearSelectedItem();
}