Core Data

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#Apple Event #AI #Core Data #CloudKit #Dev Diary #Dev Tools #Frameworks #Life #SwiftUI #SwiftData #Swift #Tools #Web

2024

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2020

Model Inheritance in Core Data

Dec 2024

One of Core Data's outstanding features is its ability to allow developers to declare data models in a manner closer to object-oriented programming without worrying about the underlying storage implementation details. Within this framework, model inheritance is a particularly important mechanism. This article delves into the core concepts of model inheritance, including Parent Entity, Sub Entity, and Abstract Entity. We will analyze their advantages and disadvantages and explore how to achieve similar effects without directly using these features.

Using Transactions Instead of Save in SwiftData and Core Data

Nov 2024

Ensuring data consistency and integrity is crucial in data persistence operations. The SwiftData framework introduces the `transaction` method in `ModelContext`, providing developers with a more elegant way to organize and manage data operations. This article explores how to use the concept of transactions to build more reliable and efficient persistence operations.

Mastering Data Tracking and Notifications in Core Data and SwiftData

Nov 2024

Core Data and SwiftData, as powerful persistence frameworks in the Apple ecosystem, not only provide declarative data listening tools like @FetchRequest and @Query, but also have a complete set of data tracking and notification mechanisms built-in. Understanding and mastering these mechanisms is crucial for building robust data-driven applications. This article will take you through multi-layered solutions—from simple custom notifications to the powerful Persistent History Tracking and SwiftData History—to help you handle various complex data synchronization scenarios.

Starting with Project Refactoring: Sharing Five Swift Modules

Oct 2024

Recently, I embarked on the reconstruction of an app that had not received significant updates for four years. During the process, I extracted some functional modules and shared them as open-source projects. This article provides a brief introduction to the libraries I have open-sourced over the past two months.

Reinventing Core Data Development with SwiftData Principles

Oct 2024

In modern application development, an efficient persistence framework is crucial. The emergence of SwiftData once caught the eyes of many Core Data developers, who anticipated the advent of a new era integrating modern programming concepts. This article will explore how to apply SwiftData's way of thinking within Core Data, focusing on data modeling and concurrent programming.

NSManagedObjectID and PersistentIdentifier: Mastering Data Identifiers in Core Data and SwiftData

Sep 2024

Core Data and SwiftData are powerful data management frameworks designed by Apple for developers, capable of efficiently handling complex object relationships, hence known as object graph management frameworks. In these two frameworks, NSManagedObjectID and PersistentIdentifier serve similar functions and are both extremely important. This article will delve into their features, usage methods, and important considerations.

Core Data Reform: Achieving Elegant Concurrency Operations like SwiftData

Apr 2024

SwiftData, as the successor to Core Data, has introduced a multitude of innovative and modern design ideas. Despite its availability for some time now, many developers have yet to adopt it in their projects. This situation is partly due to SwiftData's higher requirements for the operating system version. Additionally, because SwiftData is not yet mature enough in some functionalities, developers might choose to continue using Core Data even if their operating system version meets SwiftData’s requirements. Can we integrate some of SwiftData's excellent design philosophies and ingenious implementations into the practical use of Core Data? This article aims to explore how to introduce elegant and safe concurrency operations similar to those of SwiftData into Core Data, implementing a Core Data version of @ModelActor.

Mastering Relationships in Core Data: Practical Application

Jan 2024

In the previous article, "Mastering Relationships in Core Data Fundamentals" we explored the basic concepts and principles of relationships in Core Data. Building on that foundation, this article aims to share practical experience and techniques for handling relationships in Core Data. The goal is to assist developers in more effectively utilizing the relational features of the Core Data framework, thereby enhancing development flexibility and efficiency.

Mastering Relationships in Core Data: Fundamentals

Jan 2024

In the numerous discussions about Core Data, "object graph management" undoubtedly appears as a core concept. As a renowned framework for object graph management, Core Data's key task is how it precisely describes and effectively manages the complex relationships between different data instances. Indeed, the ability to manage relationships not only constitutes the core characteristic of Core Data but also represents a significant advantage over other data persistence frameworks. In this article, we will delve into the basic concepts of relationships in Core Data, while providing important guidance and suggestions for implementing these relationships.

Exploring CoreData - From Data Model Creation to Managed Object Instances

Sep 2023

This article will delve into the inner workings of Core Data in constructing managed object instances from a data model.

SwiftDataKit: Unleashing Advanced Core Data Features in SwiftData

Sep 2023

This article will discuss how developers can call the advanced features provided by Core Data in SwiftData without using the Core Data stack, in order to extend the current capabilities of SwiftData.

WWDC 2023, What’s New in Core Data

Jul 2023

Although at WWDC 2023, Apple will mainly focus on introducing the new data framework SwiftData, Core Data, as the cornerstone of SwiftData, has also been enhanced to some extent. This article will introduce the new features that Core Data has gained this year.

Memory Optimization Journey for a SwiftUI + Core Data App

Mar 2023

This article guides readers on enhancing memory performance for SwiftUI + Core Data apps using a sample.

SwiftUI and Core Data: Safely Responding to Data

Dec 2022

This article discusses how to prevent serious errors in views, provide accurate information to users, and respond to data changes in real time.

SwiftUI and Core Data: Data Fetching

Dec 2022

This article will discuss how to efficiently retrieve Core Data within SwiftUI views and create a new FetchRequest that utilizes mock data.

SwiftUI and Core Data: Data Definition

Nov 2022

In future articles, we will attempt to create a SwiftUI + Core Data app using a new approach to see if we can avoid and improve some of the previous issues. This article will first explore how to define data.

SwiftUI and Core Data: The Challenges

Nov 2022

Currently, my main challenge and research direction is how to integrate Core Data into popular application architectures, and make it work more smoothly in environments such as SwiftUI, TCA, Unit Tests, and Preview.

Ask Apple 2022 Q&A Related on Core Data (Part 2)

Oct 2022

Ask Apple provides developers with an opportunity to directly communicate with Apple engineers outside of WWDC. This article summarizes some of the Q&A related to Core Data from this event, and adds a bit of personal insight. This is Part 2 of the series.

Ask Apple 2022 Q&A Related on Core Data (Part 1)

Oct 2022

Ask Apple creates an opportunity for developers to directly communicate with Apple engineers outside of WWDC. This article compiles some of the Q&A related to Core Data from the event, and includes some personal insights. This is Part 1.

Switching Core Data Cloud Sync Status in Real-Time

Jul 2022

Core Data with CloudKit itself does not offer an option to enable or disable cloud synchronization in real-time. This article will attempt to propose a solution to this issue.

Batch Operations in Core Data

Jun 2022

This article will introduce Core Data's batch operations, including their principles, usage methods, advanced techniques, and important considerations.

How Core Data Saves Data in SQLite

May 2022

This article covers how Core Data saves data in SQLite, including tables and fields, persistent history tracking, and identifying relationships.

Count Queries in Core Data: The Master Guide

Jan 2022

In Core Data, developers often need to deal with counting records, such as using count as a predicate or sorting condition. This article will introduce several methods for querying and using count in Core Data, suitable for different scenarios.

How to Deep Copy NSManagedObject in Core Data

Nov 2021

This article will introduce the technical challenges, development approaches, and my solution - MOCloner - for deep copying NSManagedObject in Core Data.

Several Tips on Core Data Concurrency Programming

Nov 2021

This article offers tips for Core Data concurrency programming, including debug params, reducing blocking , using perform, NSManagedObjectID and more.

Mastering Core Data Stack

Nov 2021

This article will explain how to design a Core Data Stack. It will cover the functions, components, and configurations.

How to use Derived and Transient Properties in Core Data

Oct 2021

This article introduces Derived and Transient properties in Core Data. It explains how to set them up, use them, and their benefits and drawbacks.

Showcasing Core Data in Applications with Spotlight

Sep 2021

This article explains how to add your application's Core Data to the Spotlight index using NSCoreDataSpotlightDelegate (version from WWDC 2021), making it easier for users to find and increasing your app's visibility.

Core Data with CloudKit: Sharing Data in the iCloud

Sep 2021

In this article, we will explore how to create applications that share data with multiple iCloud users using Core Data with CloudKit.

How to Preview a SwiftUI View with Core Data Elements in Xcode

Aug 2021

This article will explore some of the reasons behind SwiftUI preview crashes, how to avoid similar crashes in future development, and how to safely and reliably preview SwiftUI views that contain Core Data elements in Xcode.

Core Data with CloudKit: Synchronizing Public Database

Aug 2021

This article will introduce how to synchronize a public database to the local environment, creating a local Core Data database mirror using Core Data with CloudKit.

Core Data with CloudKit: Troubleshooting

Aug 2021

This article discusses some common issues encountered in developing Core Data with CloudKit projects, aiming to help everyone avoid detours and pitfalls.

Core Data with CloudKit: Exploring the CloudKit Dashboard

Aug 2021

This article explores the CloudKit dashboard.

Core Data with CloudKit: Syncing Local Database to iCloud Private Database

Aug 2021

In this article, we will explore the most common scenario in Core Data with CloudKit applications—synchronizing the local database with the iCloud private database.

Core Data with CloudKit: The Basics

Aug 2021

Core Data with CloudKit brings cloud storage and multi-device synchronization capabilities to Core Data applications. This article will introduce the basic knowledge of it.

Using Persistent History Tracking in CoreData

Jul 2021

This article provides an in-depth explanation of CoreData's Persistent History Tracking feature. It covers the complete process from responding, fetching, merging, to purging, and includes demonstration code for readers to utilize.

Discussing CoreData Usage in SwiftUI

Oct 2020

This article is not a tutorial on how to use CoreData with SwiftUI. Instead, it focuses on lessons, experiences, and insights I've gathered over the past year in using CoreData in SwiftUI development.