swift – Interactive AppIntents in iOS Widget Not Engaged on Xcode 16 / iOS 18

I am making an attempt to combine an interactive iOS Widget written in Swift with my Flutter app, and I am operating into points with interactive AppIntents in my widget. My objective is to have a button within the widget that triggers an AppIntent, writes a worth into Shared UserDefaults (utilizing our app group), after which my Flutter app picks up that change.

I set my widget’s deployment goal to iOS 18 and I am utilizing Xcode 15, so I ought to have entry to the brand new interactive widget APIs (like .appIntent or .buttonAction(intent:)). Nonetheless, when I attempt to use these modifiers in my widget code, I get errors comparable to:

“.appIntent will not be out there in context”
“Worth of sort ‘Button’ has no member ‘appIntent’”
I’ve tried cleansing the Derived Information folder, verified that the widget code is barely within the widget goal, and double-checked that the deployment goal is accurately set for all related targets. Regardless of that, the interactive modifiers don’t work as anticipated.

Here is a minimal code snippet of my widget:

import WidgetKit
import SwiftUI
import AppIntents

struct SimpleAppIntent: AppIntent {
    static var title: LocalizedStringResource = "Easy Motion"
    
    func carry out() async throws -> some IntentResult {
        let userDefaults = UserDefaults(suiteName: "group.NSL_homescreenapp")
        userDefaults?.set("AppIntent Triggered", forKey: "flutter_action")
        WidgetCenter.shared.reloadTimelines(ofKind: "MyHomeWidget")
        return .consequence()
    }
}

struct MyHomeWidgetEntryView: View {
    var physique: some View {
        if #out there(iOS 17.0, *) {
            Button("Laborious ios17") { }
                .buttonAction(intent: SimpleAppIntent())
                .buttonStyle(.bordered)
                .body(maxWidth: .infinity)
        } else {
            Button("Laborious ios irgendwas") { }
                .buttonStyle(.bordered)
                .body(maxWidth: .infinity)
        }
    }
}

@important
struct MyHomeWidget: Widget {
    let form: String = "MyHomeWidget"

    var physique: some WidgetConfiguration {
        StaticConfiguration(form: form, supplier: Supplier()) { _ in
            MyHomeWidgetEntryView()
        }
        .configurationDisplayName("My Residence Widget")
        .description("An interactive widget instance utilizing AppIntents.")
    }
}

struct Supplier: TimelineProvider {
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date(), message: "Placeholder")
    }
    
    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> Void) {
        let entry = SimpleEntry(date: Date(), message: "Snapshot")
        completion(entry)
    }
    
    func getTimeline(in context: Context, completion: @escaping (Timeline) -> Void) {
        let entry = SimpleEntry(date: Date(), message: "Dwell Information")
        let timeline = Timeline(entries: [entry], coverage: .atEnd)
        completion(timeline)
    }
}

struct SimpleEntry: TimelineEntry {
    let date: Date
    let message: String
}

which seems like that:

I’m confused as a result of I’ve set the whole lot as required: my widget goal’s deployment goal is iOS 18, I am on Xcode 16.2, and I’ve imported AppIntents. Has anybody encountered comparable points with interactive widgets and AppIntents? Any concepts or workarounds could be appreciated!