I am trying out the new AttributedString binding with SwiftUI’s TextEditor in iOS26. I need to save this to a Core Data database. Core Data has no AttributedString type, so I set the type of the field to “Transformable”, give it a custom class of NSAttributedString, and set the transformer to NSSecureUnarchiveFromData
When I try to save, I first convert the Swift AttributedString to NSAttributedString, and then save the context. Unfortunately I get this error when saving the context, and the save isn't persisted:
CoreData: error: SQLCore dispatchRequest: exception handling request: <NSSQLSaveChangesRequestContext: 0x600003721140> , <shared NSSecureUnarchiveFromData transformer> threw while encoding a value. with userInfo of (null)
Here's the code that tries to save the attributed string:
struct AttributedDetailView: View {
@ObservedObject var item: Item
@State private var notesText = AttributedString()
var body: some View {
VStack {
TextEditor(text: $notesText)
.padding()
.onChange(of: notesText) {
item.attributedString = NSAttributedString(notesText)
}
}
.onAppear {
if let nsattributed = item.attributedString {
notesText = AttributedString(nsattributed)
} else {
notesText = ""
}
}
.task {
item.attributedString = NSAttributedString(notesText)
do {
try item.managedObjectContext?.save()
} catch {
print("core data save error = \(error)")
}
}
}
}
This is the attribute setup in the Core Data model editor:
Is there a workaround for this?
I filed FB17943846 if someone can take a look.
Thanks.
2
0
229