Unable to pass down returned value from one view to another

//

//  ListView.swift

//  Notes10

//

//  Created by Mansidak Singh on 6/15/22.

//



import SwiftUI

import FirebaseFirestore

import Firebase

import FirebaseAuth



 

struct ListView: View {



    @StateObject var dataManager = DataManager()

    @State var isPresented = false



    var body: some View {



        NavigationView {



            ZStack{

                

            List(dataManager.notes) { note in

                NavigationLink(destination: NoteView(newNote: note.content, idd: note.id)) {

                    EmptyView()

               

                    Text(note.content)}.buttonStyle(PlainButtonStyle())

                

            .frame(height: 0)

              



            .navigationTitle("Notes")

                

            .navigationBarItems(

                trailing: Button (action: {},

                                  label: {

                    

                    NavigationLink(destination: NoteView(newNote: "", idd: "") )

                   

                       

          {Image(systemName: "plus")}

                      .simultaneousGesture(TapGesture().onEnded{

                          dataManager.addNote()

                      })}

                     ))

                    .listStyle(.plain)

                    .buttonStyle(PlainButtonStyle())

          

                

                

                

        }.environment(\.defaultMinListRowHeight, 55)

                .listStyle(.plain)

                .buttonStyle(PlainButtonStyle())

        .padding(.trailing, -80.0)

//

            }

        }.accentColor(.black)

    } }

Here is the Data Manager code that runs the addNote function

import Foundation

import FirebaseFirestore

import SwiftUI

import Firebase

import FirebaseDatabase

import FirebaseAuth









class DataManager : ObservableObject {

    

    @Published var notes: [Note] = []

    @Published var idd = ""





    func addNote()-> String{

        let user = Auth.auth().currentUser

        let uid = Auth.auth().currentUser!.uid

        let db = Firestore.firestore()







        var ref: DocumentReference? = nil

        ref = db.collection("userslist").document(uid).collection("actualnotes").addDocument(data: ["content":"New Note","time": [".sv": "timestamp"]])



        {error in



        if let error = error{

            print(error.localizedDescription)

        }



            else {

                    print("Document added with ID: \(ref!.documentID)")

              }



        }



//        @Binding var idd: String

        

      let  idd = ref!.documentID

        

         return idd

   

    }

    

    

Here is the NotesView code that accepts the idd

import Foundation

import SwiftUI



struct NoteView: View {



    

    @State var newNote: String = ""

    @State var idd: String = ""



@StateObject var dataManager = DataManager()



    var body: some View {

        TextEditor(text: $newNote)

        TextEditor(text: $idd)

   

            .padding(EdgeInsets(top: -10, leading: 10, bottom: 40, trailing: 0))

        

                      .font(.system(size: 16, design: .monospaced))

        

        



        Button (action: {

                

            dataManager.updateNote(idd: idd, noteContent: newNote)



                

            }, label: {Text("Update")}) .listStyle(.plain)

                    .buttonStyle(PlainButtonStyle())

    }

}

What is the specific problem you are having? What are you expecting to happen when you tap the Add button and what happens when you tap the Add button?

I looked at your code for the navigation bar items. The navigation link for the Add button passes an empty note to the note view with an empty ID before you have a chance to call addNote and get the new note's ID. You may have to create a new view for adding notes and show that when someone taps the Add button. Add the note when someone taps an Add button in the Add Note view.

Your DataManager class refers to a Note struct or class. Why do you have separate @State properties for the note contents and ID in the NoteView struct instead of a Note instance? Your addNote function could return the note instead of the ID. I think it would be easier to deal with notes than to deal with their individual pieces separately.