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@tciuro
Last active March 29, 2024 11:19
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SwiftUI Form Highlight Issue
//
// ContentView.swift
// FormRowHighlightIssue
//
// Created by Tito Ciuro on 3/27/24.
//
import SwiftUI
enum Route: Hashable {
case one
case two
case three
}
@Observable
final class SomeViewModel {
var count: Int = 0
@MainActor
func setRandomCount() {
count = Int.random(in: 1 ... 99)
}
}
@MainActor
struct ContentView: View {
@State private var viewModel = SomeViewModel()
@State private var navigationPath: [Route] = []
var body: some View {
NavigationStack(path: $navigationPath) {
Form {
Section {
NavigationLink(value: Route.one) {
Label("\(viewModel.count)", systemImage: "stethoscope")
}
NavigationLink(value: Route.two) {
Label("Two", systemImage: "stethoscope")
}
}
Section {
NavigationLink(value: Route.three) {
Label("\(viewModel.count)", systemImage: "stethoscope")
}
}
}
.navigationDestination(for: Route.self) { route in
switch route {
case .one:
Text("One")
case .two:
Text("Two")
case .three:
Text("Three")
}
}
.navigationBarTitleDisplayMode(.inline)
.navigationTitle("Selection Issue")
.task {
viewModel.setRandomCount()
}
}
}
}
#Preview {
ContentView()
}
@mattmassicotte
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I wrote about this a little: https://www.massicotte.org/swiftui-isolation

There are things you can do to make this more automatic, including the somewhat extreme option I have here: https://github.com/mattmassicotte/ConcurrencyRecipes/blob/main/Recipes/SwiftUI.md

But I'm afraid I don't think this is related to your original issue....

@tciuro
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Author

tciuro commented Mar 29, 2024

Did read thoroughly, thanks for the info. Honestly, I hesitate to touch anything without knowing what's going on. I really feel like this is a SwiftUI bug. One thing I've done is add a view state manager I wrote a while ago, similar to Michael Long's solution. It works fine because when the state changes, it redraws the view. But I feel it's a heavy hammer I shouldn't have to be using.

@mattmassicotte
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I’m just not sure. And it may be a bug! I just don’t have enough SwiftUI experience to help I’m afraid.

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