Hi! I am working on an app for Vision Pro. I would like to create a SideBar in a view that shows different topics, that you can click on. Firstly, I need help understanding how to create a SideBar. Also, I have already made the different topics that will be displayed on the SideBar but I don't know how to link the SideBar up to the topics view. For example, if a user clicks on Maple Trees as a topic in the SideBar, it would take them to a new window that talks about Maple Trees. If you can help, that would be great!

Hi! I am trying to create an iOS application but also for visionOS. In the target settings, I have iPhone and Vision Pro added under the supported destinations. The problem that I am running into is that the Firebase messaging and the user notifications are not supported with Vision Pro. Is there anyway to just make those lines of code only for the iOS supported destination? If you could help, that would be greatly appreciated!

Hi, I am trying to install the "Git" command from Terminal but an error message pops up. If there is anyone that could help, that would be greatly appreciated. Also, I am on macOS Sonoma and Xcode 15 Beta 3. "Can't install the software because it is not currently available from the Software Update server."

I am having trouble building my app because this error always pops up. Fatal error: No ObservableObject of type ModelData found. A View.environmentObject(_:) for ModelData may be missing as an ancestor of this view. I hope that you can help me. Below is the code that would be involved with this issue. Model Data - import Foundation import Combine final class ModelData: ObservableObject {     @Published var appleos: [AppleOS] = load("appleosData.json")          var features: [AppleOS] {            appleos.filter { $0.isFeatured }        }          var categories: [String: [AppleOS]] {             Dictionary(                 grouping: appleos,                 by: { $0.category.rawValue }             )         } } func load<T: Decodable>(_ filename: String) -> T {     let data: Data     guard let file = Bundle.main.url(forResource: filename, withExtension: nil)         else {             fatalError("Couldn't find \(filename) in main bundle.")     }     do {         data = try Data(contentsOf: file)     } catch {         fatalError("Couldn't load \(filename) from main bundle:\n\(error)")     }     do {         let decoder = JSONDecoder()         return try decoder.decode(T.self, from: data)     } catch {         fatalError("Couldn't parse \(filename) as \(T.self):\n\(error)")     } } AppleOSList - import SwiftUI struct AppleOSList: View {     @EnvironmentObject var modelData: ModelData     @State private var showFavoritesOnly = false     @State private var filter = FilterCategory.all     @State private var selectedAppleOS: AppleOS?          enum FilterCategory: String, CaseIterable, Identifiable {         case all = "All"         case operatingsystems = "Apple's Operating Systems"         var id: FilterCategory { self }     }          var filteredAppleOS: [AppleOS] {         modelData.appleos.filter { appleos in             (!showFavoritesOnly || appleos.isFavorite)             && (filter == .all || filter.rawValue == appleos.category.rawValue)         }     }          var title: String {             let title = filter == .all ? "AppleOS" : filter.rawValue             return showFavoritesOnly ? "Favorite \(title)" : title         }          var index: Int? {            modelData.appleos.firstIndex(where: { $0.id == selectedAppleOS?.id })        }     var body: some View {         NavigationView {             List(selection: $selectedAppleOS) {                 ForEach(filteredAppleOS) { appleos in                     NavigationLink {                         AppleOSDetail(appleos: appleos)                     } label: {                         AppleOSRow(appleos: appleos)                     }                     .tag(appleos)                 }             }             .navigationTitle(title)             .frame(minWidth: 300)             .toolbar {            ToolbarItem {                Menu {                Picker("Category", selection: $filter) {                    ForEach(FilterCategory.allCases) { category in                        Text(category.rawValue).tag(category)                    }                }                .pickerStyle(.inline)                                        Toggle(isOn: $showFavoritesOnly) {                        Text("Favorites only")                    }                } label: {                    Label("Filter", systemImage: "slider.horizontal.3")                     }                 }             }                          Text("Select an OS")         }         .focusedValue(\.selectedAppleOS, $modelData.appleos[index ?? 0])     } } struct AppleOSList_Previews: PreviewProvider {     static var previews: some View {         AppleOSList()         .environmentObject(ModelData())     } }