FB12076468

NavFunApp.swift

import SwiftUI

/* 
   In Xcode 14.3 RC1, running against iOS 16.4:

   When you run this app, the first and second screens show fine. When you tap the last "Third Presentation" button, the last
   screen should slide on.

   For some reason, if you have the last few lines uncommented (the ones which mention SFSafariViewController, when you 
   tap the "Third Presentation" button, the app locks up and the CPU goes to 100%.

   Another way to fix it is to remove the 'SecondScreen' view's @Environment(\.dismiss) 
*/

@main
struct NavFunApp: App {

    @State var presenting: Bool = false

    var body: some Scene {
        WindowGroup {
            NavigationStack {
                Button("Show Product list", action: { presenting = true })
                    .navigationDestination(
                        isPresented: $presenting,
                        destination: {
                            SecondScreen(model: .init())
                        }
                    )
            }
        }
    }
}

final class SecondScreenModel: ObservableObject {

    @Published var presenting: Bool = false

}

struct SecondScreen: View {

    @Environment(\.dismiss) var dismiss

    @ObservedObject var model: SecondScreenModel

    var body: some View {
        Button("Third Presentation!", action: { model.presenting = true })
            .navigationDestination(
                isPresented: $model.presenting,
                destination: { Text("It's working") }
            )
    }
}

/**
 UNCOMMENT BELOW TO BREAK `Third Presentation` BUTTON
 */

import SafariServices

struct SomeThing {

    func getSpecial() -> SFSafariViewController {
        SFSafariViewController(url: URL(string: "https://example.com")!)
    }

}