SwiftUI Fundamentals

Feb 28 2023 · Swift 5.7, macOS Venture 13.1, Xcode 14.2

Part 2: Navigation & Data Flow

18. Environment

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Previous episode: 17. Challenge: StateObject & ObservableObject Next episode: 19. Conclusion

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What if you have some data that lots of parts of your app depend on, like your user model?

MovieList()
  .environmentObject(UserStore())
@EnvironmentObject var userStore: UserStore
leading:
  NavigationLink(destination: UserView(❌userStore: userStore❌))
@EnvironmentObject var userStore: UserStore
struct UserView_Previews: PreviewProvider {
  static var previews: some View {
    UserView()
      .environmentObject(UserStore())
  }
}
@EnvironmentObject var userStore: UserStore
.onAppear { genre = userStore.currentUserInfo.favoriteGenre }
static var previews: some View {
  MovieList(movieStore: MovieStore())
    .environmentObject(UserStore())
}
@Environment(\.dismiss) var dismiss
dismiss()