How To Update Data in Another View Controller without Segue (SideMenu) - swift

Question

I am using SideMenu and I am trying to add an item to that SideMenu from another View Controller.
I store the items for SideMenu in habits object. But I have no idea how to add a new item from ADD VIEW CONTROLLER as there is no segue.
To sum up;
How can I access/edit habits object in SideMenu from "Add View Controller"
Here is my code for SideMenu;
import UIKit
import SideMenu
import FSCalendar
class MenuListController: UITableViewController {
var habits = [Habit]()
var selectedHabitIndex = 0
let darkColor = UIColor(red: 33/255.0, green: 33/255.0, blue: 33/255.0, alpha: 1)
override func viewDidLoad() {
super.viewDidLoad()
tableView.reloadData()
tableView.backgroundColor = darkColor
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
// MARK: - HABIT INITILIZAR
var dateStrings = ["2020-12-25","2020-12-24","2020-12-23","2020-12-22"]
var dateObjects = [Date]()
let dateFormatter = DateFormatter()
for date in dateStrings{
dateFormatter.dateFormat = "yyyy-MM-dd"
let dateObject = dateFormatter.date(from: date)
dateObjects.append(dateObject!)
}
let formatter = DateFormatter()
formatter.dateFormat = "yyyy/MM/dd"
let someDate = formatter.date(from: "2020/12/29")
habits = [Habit(name: "Read a book", selectedDatesArray: dateObjects),
Habit(name: "Go for a walk", selectedDatesArray: dateObjects)
]
}
// MARK: - Number of Habits in the Table View
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return habits.count
}
// MARK: - Display Names of the Habits in the Table View
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = habits[indexPath.row].name
cell.textLabel?.textColor = .white
cell.backgroundColor = darkColor
return cell
}
}
Main View Controller
import UIKit
import SideMenu
import FSCalendar
class ViewController: UIViewController, FSCalendarDelegate, FSCalendarDelegateAppearance {
var selectedDateArray : [Date] = []
var habits = [Habit]()
var menu: SideMenuNavigationController?
var selectedHabit: Habit?
#IBOutlet weak var calendar: FSCalendar!
var selectedDate = NSDate()
override func viewDidLoad() {
super.viewDidLoad()
calendar.delegate = self
calendar.scrollDirection = .vertical
calendar.allowsMultipleSelection = true
calendar.locale = NSLocale(localeIdentifier: "tr") as Locale
menu = SideMenuNavigationController(rootViewController: MenuListController())
menu?.leftSide = true
menu?.setNavigationBarHidden(true, animated: false)
SideMenuManager.default.leftMenuNavigationController = menu
SideMenuManager.default.addPanGestureToPresent(toView: self.view)
var dateStrings = ["2020-12-25","2020-12-24","2020-12-23","2020-12-22"]
var dateObjects = [Date]()
let dateFormatter = DateFormatter()
for date in dateStrings{
dateFormatter.dateFormat = "yyyy-MM-dd"
let dateObject = dateFormatter.date(from: date)
dateObjects.append(dateObject!)
}
habits = [Habit(name: "Read a book", selectedDatesArray: dateObjects),
Habit(name: "Go for a walk", selectedDatesArray: dateObjects)
]
}
func toggleSideBar() {
present(menu!, animated: true, completion: nil)
}
#IBAction func didMenuTapped(_ sender: UIButton) {
present(menu!, animated: true, completion: nil)
}
func showSelectedDates (habit: Habit) {
calendar.select(habit.selectedDatesArray)
}
func setTitle(habit: Habit) {
title = habit.name
}
func calendar(_ calendar: FSCalendar, didSelect date: Date, at monthPosition: FSCalendarMonthPosition) {
selectedDateArray.append(date)
}
func updateUI() {
setTitle(habit: selectedHabit ?? habits[0] )
showSelectedDates(habit: selectedHabit ?? habits[0])
}
}
Add Habit View Controller
import UIKit
class AddHabitViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var textField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func addbuttonTapped(_ sender: UIButton) {
// NO IDEA WHAT TO PUT HERE?
self.dismiss(animated: true, completion: nil)
}
}

Answer 1

protocol MenuVCDataFillDelegate : class {
func addNewData(data: Habit)
}
class MenuListController : UITableViewController,MenuVCDataFillDelegate {
func addNewData(data: Habit){
habits.append(data)
}
}
Then, define your main ViewController like this:
class ViewController : UIViewController, AddHabitDelegate {
weak var menuDelegate : MenuVCDataFillDelegate?
func addMenuVC(){
let vc = MenuListController()
self.menuDelegate = vc
}
func navigateToAddHabit(){
let vc = AddHabitViewController()
vc.delegate = self
}
func newHabitAdded(data: Habit){
delegate?.addNewData(data: data)
}
}
And modify your AddHabitViewController to fill this data when added:
protocol AddHabitDelegate : class {
func newHabitAdded(data: Habit)
}
class AddHabitViewController: UIViewController {
weak var delegate : AddHabitDelegate?
func needsAddItem(data: Habit){
delegate?.newHabitAdded(data: data)
}
}

Answer 2

You can use closure or delegates pattern to pass your habit object. Implement the code below by checking, you can use this sample pattern.
// AddHabitViewController
typealias SuccessListener = (Habit) -> ()
var successListener: SuccessListener?
#IBAction func addbuttonTapped(_ sender: UIButton) {
self.dismiss(animated: false, completion: {
passTheHabitObj = Habit(name: "yourString", selectedDatesArray: dateObject)
self.successListener?(passTheHabitObj)
})
}
// ViewController
var habit = [HabitArray]() // use your array for data
let sb = UIStoryboard(name: "Main", bundle: nil)
if let destVC = sb.instantiateViewController(withIdentifier: "AddHabitViewController") as? AddHabitViewController {
destVC.successListener = { habitObj in
habit.append(habitObj)
}

Answer 3

thanks all for the answers. I tried both approaches but could not make it work.
Using the notification center solved my problem;
In AddHabitVC;
NotificationCenter.default.post(name: Notification.Name("ourCustom"), object: textField.text)
In SideMenuVC:
var observer : NSObjectProtocol?
observer = NotificationCenter.default.addObserver(forName: Notification.Name("ourCustom"), object: nil, queue: .main, using: { (notification) in
guard let object = notification.object as? String else {
return
}
self.items.append(object)
self.tableView.reloadData()
})
Thanks.