Saving multiple TextViews in a tableView format - ios

Question

Simple app but it's kicking my backside! I have a tableView with 4 notes, when user clicks on one, detailView Screen pops up allowing users to enter text. The challenge is to save each text that the user enters. I used UserDefaults as you'll see but I am not quite getting it right. I want to save each individual note. However, what keeps happening is that anytime I click on the row, and enter text, and save, that text gets saved into all 4 notes. I think my issue is coming from the didSelectRowAt() method but I am not sure. Please take a look and tell me what I need to do to access each individual note's textView in order to save them individually. My notes are contained in an array called notes, inside the main ViewController.swift.
here's my ViewController.swift
import UIKit
class ViewController: UITableViewController {
var notes = ["Note1", "Note2", "Note3", "Note4"]
override func viewDidLoad() {
super.viewDidLoad()
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return notes.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = notes[indexPath.row]
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let vc = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController{
vc.selectedNote = notes[indexPath.row]
navigationController?.pushViewController(vc, animated: true)
}
}
}
and here's my detailViewController
import UIKit
class DetailViewController: UIViewController {
#IBOutlet var textView: UITextView!
var selectedNote: String?
var notesTwo = [String]()
override func viewDidLoad() {
super.viewDidLoad()
let otherVC = ViewController()
notesTwo = otherVC.notes
let defaults = UserDefaults.standard
if let noteText = defaults.string(forKey: "noteText"){
textView.text = noteText
}
textView.font = UIFont(name: "Helvetica-Bold", size: 18)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if let noteText = textView.text{
let defaults = UserDefaults.standard
defaults.set(noteText, forKey: "noteText")
}
}
}

Answer 1

If you use userdefault to save text, it will override previous data.
Option 1:
You should use core data / sqlite to save notes.
1)Create Entity(Notes) with two attribute createdDate and noteText
Save notes to from detail vc to core data with combination of created/modified date and notesText
Use fetchController to firstVc to update data
Option 2:
Create model with two instance variable and save model directly to user default
And and refresh firstVC ui in viewWillAppear
https://cocoacasts.com/ud-5-how-to-store-a-custom-object-in-user-defaults-in-swift

Answer 2

if you need to do this using user defaults, instead of notes you have to keep notes key that can use as user default key, then you can access them everywhere when you need.
here is the way of your code should be change:
class ViewController: UITableViewController {
var noteKeys = ["Note1", "Note2", "Note3", "Note4"]
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
//after your detail view controller dismiss time you have to reload your table view data again
self.tableView.reloadData()
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return noteKeys.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let savedText: String = UserDefaults.standard.value(forKey: noteKeys[indexPath.item]) as? String ?? "empty"
cell.textLabel?.text = savedText
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let vc = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController{
vc.selectedNoteKey = noteKeys[indexPath.row]
navigationController?.pushViewController(vc, animated: true)
}
}
}
and inside DetailViewController code should be change like this:
class DetailViewController: UIViewController {
#IBOutlet var textView: UITextView!
var selectedNoteKey: String!
override func viewDidLoad() {
super.viewDidLoad()
textView.font = UIFont(name: "Helvetica-Bold", size: 18)
let defaults = UserDefaults.standard
if let noteText = defaults.string(forKey: self.selectedNoteKey){
textView.text = noteText
}
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if let noteText = textView.text{
let defaults = UserDefaults.standard
defaults.set(noteText, forKey: self.selectedNoteKey)
defaults.synchronize()
}
}
}