在这段代码中，我试图更新对象，但我在更新列表数组时遇到了麻烦，导致了意外的结果，特别是在应用editTask脚本时，似乎他们将新对象添加到Realm中，但没有更新数据。我不知道我的代码的哪一部分是错误的，请帮助我在Realm中修复此editTask。
这是我的领域模型：

class DatabaseTask {
    
    static let shared = DatabaseTask()
    
     var realm = try! Realm()
    
    func createTask(title: String, date: String, startTime: String, endTime: String, users: [User], category: [Categories], status: [Status]) {
        try! realm.write {
            let task = Task()
            task.title = title
            task.date = date
            task.startTime = startTime
            task.endTime = endTime
            let listUser = List<User>()
            listUser.append(objectsIn: users)
            task.user = listUser
            let listCategory = List<Categories>()
            listCategory.append(objectsIn: category)
            task.category = listCategory
            let listStatus = List<Status>()
            listStatus.append(objectsIn: status)
            task.status = listStatus
            realm.add(task)
        }
    }
        
    func editTask(task: Task?, newTitle: String, newDate: String, newStartTime: String, newEndTime: String , newUser: [User], newCategory: [Categories]) {
        try! realm.write {
            task?.title = newTitle
            task?.date = newDate
            task?.startTime = newStartTime
            task?.endTime = newEndTime
            task?.user.removeAll()
            task?.user.append(objectsIn: newUser)
            task?.category.removeAll()
            task?.category.append(objectsIn: newCategory)
        }
    }

这是处理创建和编辑的屏幕：我在taskEdit变量中存储来自上一个屏幕的数据，现在当我有了来自刚刚创建域的屏幕的数据时，我使用数据taskEdit再次编辑数据域

import UIKit

class TaskCalenderVC: UIViewController {
    
    @IBOutlet weak var myTable: UITableView!
    @IBOutlet weak var btMore: UIButton!
    @IBOutlet weak var createTask: UIButton!
    
    var arrUsers: [User] = []
    var arrCategori: [Categories] = []
    var arrStatus: [Status] = []
    var titleTask: String = ""
    var dateTask : String = ""
    var startTimes: String = ""
    var endTimes : String = ""
    
    var taskEdit: Task?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        myTable.dataSource = self
        myTable.delegate = self
    }
    
    @IBAction func createTasks(_ sender: Any) {
        
        let saveTasks = DatabaseTask.shared.getTask()
        
        let titleOverlapping = saveTasks.contains(where: { $0.title == titleTask })
        let dateOverlapping = saveTasks.contains(where: { $0.date == dateTask })
        let startTimeOverlapping = saveTasks.contains(where: { $0.startTime == startTimes })
        let endTimeOverlapping = saveTasks.contains(where: { $0.endTime == endTimes })
        let usersOverlapping = saveTasks.contains(where: { $0.user.toArray().contains(where: { arrUsers.contains($0) }) })
        
        if titleOverlapping || dateOverlapping || startTimeOverlapping || endTimeOverlapping || usersOverlapping {
            
            showAlert(with: "Error", message: "Task values overlap or are empty.")
            
        } else {
            
            if let taskEdit = taskEdit {
                // Edit task
                DatabaseTask.shared.editTask(task: taskEdit, newTitle: titleTask, newDate: dateTask, newStartTime: startTimes, newEndTime: endTimes, newUser: arrUsers, newCategory: arrCategori)
                
            } else {
                // Create task
                DatabaseTask.shared.createTask(title: titleTask, date: dateTask, startTime: startTimes, endTime: endTimes, users: arrUsers, category: arrCategori, status: arrStatus)
            }
            self.dismiss(animated: true)
            self.tabBarController?.selectedIndex = 0
            
        }
    }
        func showAlert(with title: String, message: String) {
            let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
            present(alert, animated: true, completion: nil)
        }
    }