This section shows you how you can use the ObservedCollection<T> class to create an inventory management system.
In game development, an inventory system is crucial for managing a player's collection of items. A great way to keep track of these items is to use an observable collection.
Here's an example Item class to represent an item in the player's inventory:
We will use an ObservedCollection to store all the items in the inventory and update the database whenever an item is picked up or dropped. This is accomplished through the InventoryManager class, which implements the inventory system:
usingObserved;usingUnityEngine;publicclassInventoryManager:MonoBehaviour{ // Create an observed collection to store the inventory itemspublicObservedCollection<Item> inventory =newObservedCollection<Item>(); // Subscribe to the collection's changes in the Awake methodprivatevoidAwake() {inventory.Subscribe(UpdateInventoryDatabase); } // Add an item to the inventory and trigger the update in the inventory databasepublicvoidAddItem(Item item) { // Add the item to the observed collectioninventory.Add(item); } // Remove an item from the inventory and trigger the update in the inventory databasepublicvoidRemoveItem(Item item) { // Remove the item from the observed collectioninventory.Remove(item); }}
A separate class, such as DatabaseManager, can be used to handle the updates to the database whenever there is a change to the inventory:
publicclassDatabaseManager:MonoBehaviour{publicInventoryManager inventoryManager;privatevoidAwake() { // Subscribe to the inventory changes in the Awake methodinventoryManager.inventory.Subscribe(UpdateInventory); }privatevoidUpdateInventory(Item item,ChangeType action) { // Write code to update the inventory database with the changes made to the inventory // ... // Check if the action is "add"if (action ==ChangeType.Added) { // Write code to add the item to the inventory database // ... } // Check if the action is "remove"elseif (action ==ChangeType.Removed) { // Write code to remove the item from the inventory database // ... } }}
This example demonstrates how to use the AddItem and RemoveItem methods to update the inventory, and how to use the UpdateInventory method to handle updates to the database. This method can be modified to include the logic for updating the database, such as sending a request to a server or writing to a local file.