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What you learned

These last three projects have really pushed hard on data, starting first with sending and receiving data using the internet, then going into SwiftData so you can see how real apps manage their data. The skills you’ve learned in this projects are perhaps more important than you realize, because if you put them all together you can now fetch data from the internet, store it locally, and let users filter to find the stuff they care about.

Here’s a quick recap of all the new things we covered in the last three projects:

  • Building custom Codable conformance
  • Sending and receiving data using URLSession
  • The disabled() modifier for views
  • Building custom UI components using @Binding
  • Adding multiple buttons to an alert
  • Editing SwiftData objects using @Bindable.
  • Using @Query to query SwiftData objects
  • Sorting SwiftData results using SortDescriptor
  • Filtering data using #Predicate
  • Creating relationships between SwiftData models
  • Syncing SwiftData with iCloud

That’s a comparatively short list compared to some other projects, but I think it’s fair to say these topics have been a real step up: SwiftData is hard in places, particularly in the way we need to work to get dynamic sorting and filtering, but it's definitely worth it!

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