如何在另一个视图中更新数据 Controller 没有 Segue (SideMenu)

Question

我正在使用SideMenu ，我正在尝试从另一个 View Controller 向该 SideMenu 添加一个项目。

我将 SideMenu 的项目存储在习惯 object 中。 但我不知道如何从 ADD VIEW CONTROLLER 添加新项目，因为没有转场。

总结一下; 如何从“添加视图控制器”在 SideMenu 中访问/编辑习惯 object

这是我的 SideMenu 代码；

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
    }
    
}

主视图 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])
        
    }
    
}
    

添加习惯查看 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

您可以使用闭包或委托模式来传递您的习惯 object。 通过检查实现下面的代码，您可以使用此示例模式。

// 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 2

protocol MenuVCDataFillDelegate : class {
    func addNewData(data: Habit)
}

class MenuListController : UITableViewController,MenuVCDataFillDelegate {
    func addNewData(data: Habit){
        habits.append(data)
    }
}

然后，像这样定义您的主 ViewController：

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)
    }
}

并修改您的 AddHabitViewController 以在添加时填充此数据：

protocol AddHabitDelegate : class {
    func newHabitAdded(data: Habit)
}

class AddHabitViewController: UIViewController {
    weak var delegate : AddHabitDelegate?

    func needsAddItem(data: Habit){
        delegate?.newHabitAdded(data: data)
    }
}

Answer 3

谢谢大家的回答。 我尝试了这两种方法，但无法使其工作。

使用通知中心解决了我的问题；

在 AddHabitVC 中；

NotificationCenter.default.post(name: Notification.Name("ourCustom"), object: textField.text)

在 SideMenuVC 中：

    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()
        })

谢谢。