100 Days of SwiftUI

2026-06-28

Project 11, part 3

Finishing up the main part of the Bookworm app

Showing book details

making a DetailView #Preview of SwiftData requires some setup — basically you have to set up the whole system because otherwise the Canvas gets unhappy

Sorting SwiftData queries using `SortDescriptor`

if you don’t choose a sort order then the user may get an unpredictable experience
can do multi-sort using SortDescriptor
- but only a few properties, with or without reversing the order within the list
- you make an array of SortDescriptor(\DataModel.field, order: .reverse) in the @Query e.g.
```
@Query(sort: [
  SortDescriptor(\Book.title),
  SortDescriptor(\Book.author)
]) var books: [Book]
```

Though I don’t understand why anyone would want to sort by title first

Deleting from a SwiftData query

samoyed sketch

samoyed sketch

I’m only watching the videos for the puppers

deleting items from SwiftData is not much more complicated than removing items from an array

What I realllllly want to be able to do is EDIT MY ENTRIES. We haven’t discussed that at all in any of these “data” apps.

Using an alert to pop a `NavigationLink` programmatically

using the dismiss() pattern we’ve used before