WWDC 2023 Summary

Kirill Kunst

Migrate to SwiftData

URL: https://developer.apple.com/videos/play/wwdc2023/10189/

This video guides developers on how to start using SwiftData in their apps. It demonstrates how to use Xcode to generate model classes from existing Core Data object models, how to use SwiftData alongside previous implementations, or even how to replace existing solutions completely.

Chapters:

0:00 - Intro
1:06 - Generate model classes
3:05 - Complete adoption
6:43 - Coexists with Core Data
10:47 - Wrap-up

Resources:

2. Explore testing in-app purchases

URL: https://developer.apple.com/videos/play/wwdc2023/10142/

This video provides insights on how to test in-app purchases throughout the development process using StoreKit Testing in Xcode, App Store sandbox, and TestFlight. It explains the functionality of each tool and how they can be combined to create an optimal workflow for testing apps and games. The video also offers a sneak preview of how to test Family Sharing for in-app purchases and subscriptions in the App Store sandbox.

3. What's new in Core Data

URL: https://developer.apple.com/videos/play/wwdc2023/10186/

This video discusses the improvements in Core Data that can enhance your app's data persistence. It explains how to use composite attributes to create more intuitive data models, how to migrate your schema through disruptive changes when to defer intense migrations, and how to avoid overhead on a person's device. Familiarity with handling different data types in Core Data and the basics of lightweight migration is recommended to get the most out of this session.

Chapters:

0:00 - Intro
0:56 - Composite attributes
6:31 - Stage your migrations
18:23 - Defer your migrations
22:33 - Wrap-up

Resources:

4. Beyond the basics of structured concurrency

URL: https://developer.apple.com/videos/play/wwdc2023/10170/

This video delves into the task tree and how structured concurrency can help manage automatic task cancellation, task priority propagation, and useful task-local value patterns in your apps. It provides patterns and the latest task group APIs for managing resources in your app. The video also demonstrates leveraging the task tree and task-local values to gain insight into distributed systems. Prior knowledge of the basics of Swift Concurrency and structured concurrency is recommended.

Chapters:

0:56 - Structured concurrency
3:11 - Task tree
3:44 - Task cancellation
5:26 - withTaskCancellationHandler
8:36 - Task priority
10:23 - Patterns with task groups
11:27 - Limiting concurrent tasks in TaskGroups
12:22 - DiscardingTaskGroup
13:53 - Task-local values
16:58 - swift-log
17:19 - MetadataProvider
18:58 - Task traces
19:46 - Swift-Distributed-Tracing
20:42 - Instrumenting distributed computations
23:38 - Wrap-up

Resources:

Swift Distributed Tracing - Repository

5. What's new in Background Assets

URL: https://developer.apple.com/videos/play/wwdc2023/10108/

This video explains how Background Assets can help your app download content before it even launches, reducing wait times for users. It guides you on how to integrate Background Assets into an existing app, when to use essential or non-essential assets, and how to make debugging your extension easier.

Resources:

6. Build custom workouts with WorkoutKit

URL: https://developer.apple.com/videos/play/wwdc2023/10016/

This video introduces WorkoutKit, a tool that simplifies the creation, preview, and scheduling of planned workouts for the Workout app on Apple Watch. It guides developers on how to build custom intervals, create alerts, and use the built-in preview UI to send their own workout routines to Apple Watch.

Resources:

7. Demystify SwiftUI performance

URL: https://developer.apple.com/videos/play/wwdc2023/10160/

This video helps developers build a mental model for performance in SwiftUI and write faster, more efficient code. It shares some of the common causes behind performance issues and helps you triage hangs and hitches in SwiftUI to create more responsive views in your app.

Chapters:

0:00 - Introduction and performance feedback loop
3:30 - Dependencies
10:48 - Faster view updates
13:24 - Identity in List and Table

Resources:

8. Update your app for watchOS 10

URL: https://developer.apple.com/videos/play/wwdc2023/10031/

This video is a code-along that guides developers on updating an Apple Watch app to leverage the latest features in watchOS 10. It demonstrates how to use the latest SwiftUI APIs to maximize glanceability and reorient app navigation around the Digital Crown.

Chapters:

1:33 - Build against the watchOS 10 SDK
2:33 - NavigationSplitView
5:21 - TabView and vertical pagination
8:11 - Toolbar with new placement options
9:07 - Background color
11:10 - Materials

Resources:

9. Inspectors in SwiftUI: Discover the details

URL: https://developer.apple.com/videos/play/wwdc2023/10161/

Description: This video introduces Inspectors, a structural API that can enhance the detail level in your apps. It guides developers through the fundamentals of the API and how to adopt it. The video also discusses the latest updates to sheet presentation customizations and demonstrates how to combine the two to create perfect presentation experiences.

Chapters:

0:32 - Inspector
3:27 - 🍎🍐🍋🍒
9:11 - 🍏
9:37 - Presentation customizations

Resources:

What's new in SwiftUI

10. Explore Natural Language multilingual models

URL: https://developer.apple.com/videos/play/wwdc2023/10042/

This video teaches developers how to create custom Natural Language models for text classification and word tagging using multilingual, transformer-based embeddings. It demonstrates how to train with less data and support up to 27 different languages across three scripts. The video also shows how to use these embeddings to fine-tune complex models trained in PyTorch and TensorFlow.

Resources:

11. Bring widgets to life

URL: https://developer.apple.com/videos/play/wwdc2023/10028/

This video teaches developers how to create animated and interactive widgets for their apps and games. It demonstrates how to tweak animations for entry transitions and add interactivity using SwiftUI Button and Toggle. This allows developers to create powerful moments right from the Home Screen and Lock Screen.

Chapters:

1:23 - Animations
7:45 - Interactivity

Resources:

12. Meet Push Notifications Console

URL: https://developer.apple.com/videos/play/wwdc2023/10025/

This video introduces the Push Notifications Console, a tool that allows developers to quickly test user notifications in their apps. It guides developers on how to send notifications directly from the console and analyze delivery logs to learn more about their pushes. The video also shows how to generate and validate tokens to successfully authenticate with Apple Push Notification service (APNs). A basic understanding of Apple Push Notification service (APNs) and user notifications is recommended to get the most out of this session.

Chapters:

0:00 - Intro
2:26 - Send notifications
5:00 - Examine delivery logs
7:53 - Debug with tools
11:01 - Wrap-up

Resources:

13. Discover String Catalogs

URL: https://developer.apple.com/videos/play/wwdc2023/10155/

This video introduces String Catalogs in Xcode 15, which simplifies the localization of apps by managing all strings in one place. It guides developers on extracting, editing, exporting, and building strings in their projects using String Catalogs. The video also explains how developers can adopt String Catalogs in existing projects at their own pace by choosing which files to migrate.

Chapters:

0:00 - Introduction
1:29 - Demo
4:13 - Extract
13:19 - Edit
22:48 - Export
27:52 - Build
28:44 - Migrate
31:03 - Wrap-up

Resources:

Expanding Your App to New Markets

14. Debug with structured logging

URL: https://developer.apple.com/videos/play/wwdc2023/10226/

This video introduces the debug console in Xcode 15 and guides developers on how to improve their diagnostic experience through structured logging. It demonstrates how to navigate logs efficiently using advanced filtering and improved visualization. The video also shows how to use the dwim-print command to evaluate expressions in your code while debugging.

Chapters:

0:44 - Tour of the Debug Console
3:28 - Live debugging
7:25 - LLDB improvements
9:04 - Tips for logging
12:04 - Get the most out of your logging

Resources:

15. Meet StoreKit for SwiftUI

URL: https://developer.apple.com/videos/play/wwdc2023/10013/

This video introduces StoreKit for SwiftUI, which allows developers to use App Store product metadata and Xcode Previews to add in-app purchases to their apps with just a few lines of code. It showcases a new collection of UI components in StoreKit that can be used to quickly merchandise products, present subscriptions in a way that helps users make informed decisions, and more.

Resources:

16. Meet ActivityKit

URL: https://developer.apple.com/videos/play/wwdc2023/10184/

This video introduces ActivityKit, a tool that allows developers to create Live Activities, a glanceable way for someone to keep track of the progress of a task within your app. It guides developers on how to create helpful experiences for the Lock Screen, the Dynamic Island, and StandBy. The video also explains how to update your app's Live Activities, monitor activity state, and take advantage of WidgetKit and SwiftUI to build richer experiences.

Chapters:

0:00 - Intro
0:36 - Live Activity overview
4:23 - Lifecycle of Live Activities
10:43 - Building Live Activity UI
16:37 - Wrap-up

Resources:

17. What's new in StoreKit 2 and StoreKit Testing in Xcode

URL: https://developer.apple.com/videos/play/wwdc2023/10140/

This video presents the latest enhancements to StoreKit 2 and StoreKit Testing in Xcode. It covers API updates for promoted in-app purchases, StoreKit messages, the Transaction model, the RenewalInfo model, and the App Store sheet for managing subscriptions. The video also explains how to upgrade to SHA-256 for on-device receipt validation and use APIs to create SwiftUI views. Additionally, it introduces the Transaction Inspector, updates to the StoreKit configuration editor, and demonstrates how to simulate StoreKit errors for testing your app's error handling.

Chapters:

0:00 - Intro
1:29 - StoreKit 2 and StoreKit Testing in Xcode overview
4:23 - Lifecycle of StoreKit 2 and StoreKit Testing in Xcode
10:43 - Building with StoreKit 2 and StoreKit Testing in Xcode
16:37 - Wrap-up

Resources:

18. Bring widgets to new places

URL: https://developer.apple.com/videos/play/wwdc2023/10027/

This video explains how to use the latest WidgetKit APIs to make your widget look great everywhere. It guides developers on how to identify their widget's background, adjust layout dynamically, and prepare colors for vibrant rendering so that their widget can sit seamlessly in any environment.

Chapters:

0:00 - Introduction
1:44 - Transition to content margins
3:00 - Add a removable background
4:31 - Dynamically adjust layout
6:00 - Prepare for vibrant rendering

Resources:

WWDC 2023 Summary

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