Module 3 of 4 in New in iOS 26

SwiftData in iOS 26

Dec 10 2025, Swift 6.2, iOS 26, macOS 26, Xcode 26

In this module, you’ll learn about the new features in Swift Data that were introduced at WWDC 2025. The new model inheritance capabilities, and how they impact queries and model migration are covered. By Josh Steele.

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EXPERIENCE

Intermediate level

EST TIME TO COMPLETE

55 mins

CONTENT

4 lessons

Module outcomes

Refresh your knowledge on Swift Data basics, including building models, performing queries, and inserting data.
Identify the difference between composition and inheritance, evaluate whether you should employ inheritance at all, and describe how to incorporate inheritance in your SwiftData models.
Learn about predicates for building queries in SwiftData, and build predicates that are based on multiple properties.
Optimize fetches if you know you just need a limited set of data returned.
Discover when you need to worry about migrating your model schema
Learn about how to annotate your schema models for migration while using model inheritance

Covered concepts

Swift Data
Inheritance in Object Oriented Programming

Module content

SwiftData Basics Lesson (13 mins)

In this lesson you’ll get a quick recap of how to work with persistence with SwiftData, and the benefits over using Core Data.

Start

Introduction • Start Reading · 1 min

SwiftData Basics Reading · 8 mins

Performing Queries Reading · 3 mins

Conclusion Reading · 1 min

Model Inheritance Lesson (15 mins)

In this lesson, you’ll get a refresher on inheritance and composition in object oriented programming, and how to determine whether you actually need to use model inheritance when working with SwiftData.

Start

Introduction • Start Reading · 1 min

Inheritance vs Composition Reading · 7 mins

SwiftData Model Demo Video · 7 mins

Conclusion Reading · 1 min

Efficient Queries Lesson (16 mins)

In this lesson, you’ll learn how to optimize the queries for child classes you created in the last lesson.

Start

Introduction • Start Reading · 1 min

Performing Efficient Queries Reading · 6 mins

Predicates Demo Video · 8 mins

Conclusion Reading · 1 min

Updates to Schema Migration Lesson (12 mins)

In this lesson, you’ll learn about the latest updates for schema migration that incorporates model inheritance.

Start

Introduction • Start Reading · 1 min

Migrating Your Schema Reading · 5 mins

Migrating a Schema Demo Video · 5 mins

Conclusion Reading · 1 min

Module outcomes

Covered concepts

Module content

Agentic Coding with Xcode

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