NavigationSplitViewDeleteThenSelectCrash.swift

//
//  Created by Axel Le Pennec on 26/01/2024.
//  Copyright © 2024 Axel Le Pennec. All rights reserved.
// 

import SwiftUI

@main
struct FB_SwiftUI_NavigationSplitView_Delete_SelectApp: App {
  var body: some Scene {
        WindowGroup {
          ContentView()
        }
  }
}

enum SelectionString: Hashable {
    case all
    case item(String)
}

struct ContentView: View {
    @State private var selectionString: SelectionString?
    @State private var strings: [String] = []
    
    var body: some View {
        NavigationSplitView {
            List(selection: $selectionString) {
                Section {
                    NavigationLink(value: SelectionString.all) {
                        Text("All")
                    }
                }
                
                Section {
                    ForEach(strings.sorted(), id: \.self) { string in
                        NavigationLink(value: SelectionString.item(string)) {
                            Text(string)
                        }
                    }
                }
            }
            .toolbar {
                ToolbarItem {
                    Button("Add") {
                        strings.append(UUID().uuidString)
                    }
                }
            }
        } detail: {
            if let selectionString {
                switch selectionString {
                case .all:
                    Text("All")
                    
                case .item(let string):
                    Button(role: .destructive) {
                        if let index = strings.firstIndex(of: string) {
                            strings.remove(at: index)
                            self.selectionString = nil
                        }
                    } label: {
                        Text("Delete")
                    }
                }
            } else {
                Text("Select an item")
            }
        }
    }
}

#Preview {
    ContentView()
}