(Swift 5, iOS 16): MVC, Core Data, Notification Center, UIKit & XCTest

Shopping App

This app contains:

• A UITabBarController where the app is embedded into.
• 2 UINavigationControllers
• 4 UIViewControllers
• 1 Storyboard
• 1 Launchscreen
• XCTests
• Assets (App icon, buttons and 1 launchscreen image)

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Root Controller -> UITabBarController:

• This View Controller has 2 child UINavigationControllers which produce 2 TabBarItems.
• Delegate for ProductOverviewViewController and CartViewController.
• It handles getting the product objects from the JSON file to be used through out the app.
• It handles Shopping Cart data storage in CoreData.

TabBarItem 1 - View Controller Stack:

1. Top View Controller -> ProductOverviewViewController:

• Organizes the products into collections of the same type of product.
• Displays the collections on a UICollectionView.
• Delegate for ProductCatalogViewController.
• Contains a segue to ProductCatalogViewController.

2. ProductCatalogViewController:

• Receives the product list from a user-selected collection type.
• Displays the list of products on a UICollectionView.
• Can add a product to the Shopping Cart from each UICollectionViewCell.
• Delegate for ProductPageViewController.
• Contains a segue to ProductPageViewController.

3. ProductPageViewController:

• Receives a single user-selected product.
• Displays the product's information inside a UIScrollView.
• Can add the product to the Shopping Cart from the Add To Cart button.

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TabBarItem 2:

Top View Controller -> CartViewController:

• Sets up an observer to update its Shopping Cart data and UI when ProductCatalogViewController and ProductPageViewController add a new product to the Shopping Cart.
• Displays the products from the Shopping Cart on a UITableView.
• The user can change the quantity of each product (+ || -) through a UIPickerView.
• The user can remove each product from the Shopping Cart.
• The total price of all the products in the Shopping Cart is always visible to the user at the bottom of the screen.

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Other features:

• The UI adapts to light and dark modes.
• Language localization setup (Spanish included as a starter).
• Currency formatter to Locale for Strings.