Core Data CRUD App in SwiftUI - Demo Project

This project demonstrates a simple yet functional Core Data application built using SwiftUI. It showcases the fundamental CRUD (Create, Read, Update, Delete) operations for managing a list of "Students".

Video Tutorial: [https://youtu.be/R16y3QGtTXY]

This README provides an overview of the project structure and how to run it. For a detailed, step-by-step explanation of the code and concepts, please refer to the video tutorial linked above.

Project Overview

This application allows users to:

• Create: Add new students to the persistent store.
• Read: View a list of all saved students.
• Update: Edit the names of existing students.
• Delete: Remove students from the list and the persistent store.

The project utilizes:

• SwiftUI: For building the user interface declaratively.
• Core Data: Apple's framework for managing persistent data.

Running the Project

1. Prerequisites:

   • macOS with Xcode installed (version 13 or later recommended).
   • Basic understanding of Swift and Xcode.

2. Download the Project:

   • If you have the project files locally, proceed to the next step.
   • If this is a repository, clone it to your local machine using Git:

     git clone https://github.com/pratik-123/CoreDataExample.git
     cd CoreDataExample

3. Open in Xcode:

   • Locate the CoreDataExample.xcodeproj file in the project directory.
   • Double-click the file to open it in Xcode.

4. Build and Run:

   • Select a simulator or connect a physical iOS device in Xcode.
   • Press the "Play" button (Run) in the Xcode toolbar (or use the Cmd + R shortcut).
   • The application should build and launch on your selected simulator or device.

Project Structure

The project typically includes the following key files and folders:

• CoreDataExample.xcodeproj: The Xcode project file.
• CoreDataExample/: The main source code directory.
  • CoreDataExampleApp.swift: The entry point of the application.
  • ContentView.swift: The main view displaying the list of students and the add button.
  • AddStudentView.swift: The view for adding new students or editing existing ones.
  • Database.xcdatamodeld: The Core Data data model file. This defines the entities (like Student) and their attributes.
  • Student+CoreDataClass.swift: Generated Swift code for your Core Data entities.
  • Student+CoreDataProperties.swift: Generated Swift code defining the properties of your Core Data entities.

Key Concepts Demonstrated

This project demonstrates the following Core Data concepts within a SwiftUI application:

• Setting up the Core Data Stack: Initializing the NSPersistentContainer and providing the managedObjectContext to the SwiftUI environment.
• Creating Entities: Defining data structures (like the Student entity with name and id attributes) in the Data Model editor.
• Fetching Data (@FetchRequest): Using SwiftUI's @FetchRequest property wrapper to automatically fetch and observe data from Core Data.
• Creating New Objects: Instantiating new managed objects and saving them to the persistent store.
• Updating Objects: Modifying the attributes of existing managed objects and saving the changes.
• Deleting Objects: Removing managed objects from the context and the persistent store.
• Managing the managedObjectContext: Understanding how to access and save changes to the Core Data context.