Beginners Guide to SwiftData

A lightning talk that gives a brief overview of the basics of SwiftData with examples/example app.
For Mobile Dev Japan #3 on 2024/07/26. https://mobiledev-japan.connpass.com/event/323178/

Transcript

1. Mobile Dev Japan July 26, 2024 Adam Henry Safie Inc. Development Division 2 > Mobile Group > iOS Team Beginners Guide to SwiftData
2. © Safie Inc.｜ 2 Adam Henry (@monolithic_adam) • iOS Engineer • Joined Safie 2024/3 ◦ Previously STORES, Chatwork, Buyma, etc. • Living in Japan since 2011 • Hobbies ◦ Playing with my kids 🧒👧 ◦ Games 🎮 ◦ Tennis 🎾 ◦ Sake 🍶🍺
3. © Safie Inc.｜ SwiftData 3
4. © Safie Inc.｜ SwiftData (iOS 17.0+) 4 SwiftData is a framework that allows you to write your model code declaratively to add managed persistence and efficient model fetching. So, it’s CoreData but way easier.
5. © Safie Inc.｜ @Model @Attribute @Query ModelContainer & ModelContext #Predicate The Basics 5
6. © Safie Inc.｜ SwiftData Macros (@Model, @Attribute, etc.) 6
7. © Safie Inc.｜ 7 @Model A macro that defines your model’s schema from Swift code. SwiftData natively adapts your value type properties to be used as attributes. Basic and more complex values are able to be used as well (structs, enums, codable types like collections)
8. © Safie Inc.｜ 8
9. © Safie Inc.｜ 9 @Attribute Using this you can add uniqueness constraints to your schema
10. © Safie Inc.｜ @Relationship, @Transient are other macros you can use to change your schema. @Relationship - you can control the choice of inverses and specify delete propagation rules. @Transient - allows you to choose a property not to be stored by SwiftData Other Macros 10
11. © Safie Inc.｜ @Query 11
12. © Safie Inc.｜ Using the @Query property wrapper you can easily load and filter anything stored in your database with a single line of code. SwiftData supports observable for your modeled properties. @Query 12
13. © Safie Inc.｜ 13
14. © Safie Inc.｜ It didn’t play nice with enums when I built the app with SwiftData 1.0... If anyone knows a way to get it to be able to filter by an enum case please talk to me after my LT! @Query A problem I found 14
15. © Safie Inc.｜ ModelContainer & ModelContext 15
16. © Safie Inc.｜ The ModelContainer is where you describe how data is stored, or persisted, on a device. ModelContext tracks and manages a models state in memory ModelContainer & ModelContext 16
17. © Safie Inc.｜ 17
18. © Safie Inc.｜ 18
19. © Safie Inc.｜ 19
20. © Safie Inc.｜ SwiftData 2.0 (WWDC 2024) 20
21. © Safie Inc.｜ Tracking Model Changes with SwiftData History Creating your own custom Data Store (for example: JSONDataStore) #Unique Macro Preview Modifier Compound Predicates Add Index for commonly used KeyPaths or combination of KeyPaths (More Efficient/Faster Querying!) SwiftData 2.0 (WWDC 2024) New Features! 21
22. © Safie Inc.｜ Preview Modifier 22
23. © Safie Inc.｜ 23
24. © Safie Inc.｜ 24
25. © Safie Inc.｜ All iOS 18.0+ See you in a few years... 25
26. © Safie Inc.｜ What’s New in SwiftData - https://developer.apple.com/wwdc24/10137 Create a custom data store with SwiftData - https://developer.apple.com/wwdc24/10138 Track model changes with SwiftData history - https://developer.apple.com/wwdc24/10075 SwiftData 2.0 (WWDC 2024) References 26
27. © Safie Inc.｜ 27 I made an example App! It is a simple budget app that uses SwiftData to persist its data.
28. © Safie Inc.｜ 28 For Funsies I did a poll and 100% were GUI users
29. © Safie Inc｜
 We are hiring!
 More info : https://open.talentio.com/r/1/c/safie/pages/84134 
 29
 We are looking for Android / iOS engineers!
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