Modifying the JournalEntry class

Currently, when you create a new journal entry using the Add New Journal Entry screen and click the Save button, the entry will appear on the Journal List screen:

Figure 23.1: Simulator showing new entries added to the Journal List screen

If you quit and restart your app, the newly added entries will disappear:

Figure 23.2: Simulator showing new entries disappearing after the app is relaunched

This is because the contents of the journalEntries array are only kept in memory and not saved to device storage when the app is closed. To resolve this, you will implement SwiftData for your app. The first step in implementing SwiftData is to create model objects from your existing JournalEntry class, modifying this and other classes in your app as needed.

Follow these steps:

1. In the Project navigator, click the JournalEntry file (located in the Journal List Scene | Model group). Import the SwiftData framework and annotate...