The Picker does not select the value from CoreData (SwiftUI)

Question

I’m trying to select the entity from CoreData storage, but the Picker is not functional — it does not show the selected entity.

My code:

import SwiftUI struct SampleView: View { @FetchRequest(entity: Aircraft.entity(), sortDescriptors: [NSSortDescriptor(keyPath: \Aircraft.model, ascending: true)]) var aircrafts: FetchedResults<Aircraft> @State private var selection: UUID? = UUID() var body: some View { NavigationView { VStack { Form { Picker(selection: $selection, label: Text("Picker")) { ForEach(aircrafts, id: \.self) { aircraft in Text(aircraft.model ?? "Unknown") } } } } } } }

Result:

Martijn Pieters · Accepted Answer · 2022-08-23 08:46:50Z

9

Type of selection should be the same to what is selected or to tag. In your case I assume it can be as follows

@State private var selection: Aircraft? = nil

try with .tag as below

ForEach(aircrafts, id: \.self) { aircraft in Text(aircraft.model ?? "Unknown").tag(aircraft as Aircraft?) }

Updated (optional specific): according to comment of @user3687284

edited Aug 23, 2022 at 8:46

Martijn Pieters

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answered Jan 19, 2020 at 10:58

Asperi

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5 Comments

Anton Over a year ago

Thanks for your answer, Asperi! Unfortunately picker still does not work.

Asperi Over a year ago

please try updated with tag... it works with my Xcode 11.2 / iOS 13.2 (actually initial variant also works)

Anton Over a year ago

That's weird, but still no result... The picker remains empty. Xcode 11.3.1, iOS 13.3.

user3687284 Over a year ago

Try .tag(aircraft as Aircraft?)

user3687284 Over a year ago

... in Asperi's solution. That's how it works for me in a similar case. I got the solution from the answer to this question.

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