Data Model, Entities, and Attributes

Core Data Fundamentals

The data model is a key component of the Core Data stack and an integral part of a Core Data application. In this episode, we explore the data model and learn about entities and attributes.

in Core Data

Core Data and Dependency Injection

Core Data Fundamentals

I'm not going to lie. I don't like singletons. Singletons are fine if they're used correctly, but I don't like singletons for convenience. They almost always lead to problems down the line. This means that the Core Data manager isn't going to be a singleton.

in Core Data

Setting Up the Core Data Stack

Core Data Fundamentals

It's time to write some code. Had we checked the Use Core Data checkbox during the setup of the project, Xcode would have put the code for the Core Data stack in the application delegate. This is something I don't like and we won't be cluttering the application delegate with the setup of the Core Data stack.

in Core Data

Creating the Project

Core Data Fundamentals

Before we set up the Core Data stack, we need to create the project for Notes. Open Xcode and create a new project based on the Single View App template.

in Core Data

Exploring the Core Data Stack

Core Data Fundamentals

Earlier in this series, you learned what Core Data is and isn't. This episode zooms in on the building blocks of the Core Data framework.

in Core Data

Building Notes

Core Data Fundamentals

Notes is a simple application for iOS that manages a list of notes. It's a fine case study to teach you the fundamentals of the Core Data framework. In this episode, I'd like to show you what Notes is capable of.

in Core Data

What Is Core Data

Core Data Fundamentals

Developers new to Core Data usually don't take the time to learn the framework. Not knowing what Core Data is, makes it hard and frustrating to wrap your head around the ins and outs of the framework. I'd like to start by spending a few minutes exploring the nature of Core Data and, more important, explain to you what Core Data is and isn't.

in Core Data

Welcome to Core Data Fundamentals

Core Data Fundamentals

Welcome to Core Data Fundamentals. In this series, you'll learn the ins and outs of Apple's popular Core Data framework. Even though we'll be building an iOS application, the Core Data framework is available on iOS, tvOS, macOS, and watchOS, and the contents of this series apply to each of these platforms.

in Core Data

Combining Observables with RxSwift's Zip Operator

RxSwift Essentials

RxSwift defines a number of operators to combine two or more observables into a single observable. Each of these operators serves a specific purpose. In this episode, I show you how to use the zip operator to combine observables.

in RxSwift

How to Add a Free Trial to a Subscription

In this tutorial, you learn how to add a free trial to a subscription. A free trial is nothing more than an introductory offer you define in App Store Connect. The type of the introductory offer is Free. Let's look at the steps you need to take to add a free trial to a subscription.

in Announcements

How to Inspect Global Variables in Xcode Debugger

Xcode ships with a powerful debugger. It's power comes from LLDB, the debugger of the LLVM project. In this tutorial, I want to share a tip few developers know about. Although I have been using Xcode for more than a decade, I only discovered it recently.

in Xcode

What Is the Difference Between a Unary, Binary, and Ternary Operator

What is the difference between a unary, binary, and ternary operator? Someone might ask you this question during your next job interview. In this tutorial, you learn about unary, binary, and ternary operators, and I show you a few examples. Let's start with unary operators.

in Fundamentals