Module 3 of 3 in New in iOS 26

SwiftData in iOS 26

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

1
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
2
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
3
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
4
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