Sirs! Trying to create the Task manager App with core data. I have an array with all done and current tasks. I divide it for two arrays to load a tableview (it shows either current tasks or tasks are done). When I'm trying to delete a task with swipe on the table, I receive "invalid number of rows in section" error. My code is below. Please advise how to fix it? My thanks in advance.
import UIKit
import Foundation
protocol TaskNotesDelegate: AnyObject {
func refreshTasks()
func deleteTask(with id: UUID)
}
class TasksViewController: UIViewController {
@IBOutlet weak var doneTaskSwitcher: UIBarButtonItem!
@IBOutlet weak var addTaskButton: UIBarButtonItem!
static let identifier = "TasksViewController"
let tableView: UITableView = {
let tableView = UITableView()
tableView.translatesAutoresizingMaskIntoConstraints = false
return tableView
}()
let idTasksCell = "idTasksCell"
//константа для реализации функции поиска через searc controllr
let searchController = UISearchController(searchResultsController: nil)
var allTasks: [Task] = []
var doneTasks: [Task] = []
var currentTask: [Task] = []
private var filteredTasks: [Task] = []
var currentSearch = ""
var doneTasksCheck = false
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
tableView.separatorStyle = .none
tableView.register(TaskTableViewCell.self, forCellReuseIdentifier: idTasksCell)
configureSearchBar()
setConstraints()
fetchTasksFromStorage()
for i in 0..<allTasks.count {
if allTasks[i].taskIsDone {
doneTasks.append(allTasks[i])
} else {
currentTask.append(allTasks[i])
}
}
for i in 0..<allTasks.count {
print("all \(allTasks[i].id)")
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.navigationBar.backgroundColor = .white
self.tabBarController?.tabBar.backgroundColor = .white
tableView.reloadData()
}
@IBAction func showDoneTasks(_ sender: UIBarButtonItem) {
if doneTasksCheck == false {
doneTasksCheck = true
doneTaskSwitcher.title = "current"
doneTasks = doneTasks.sorted { $0.taskDate > $1.taskDate }
tableView.reloadData()
addTaskButton.isEnabled = false
} else {
doneTasksCheck = false
doneTaskSwitcher.title = "is done"
tableView.reloadData()
addTaskButton.isEnabled = true
}
}
private func indexForTask(id: UUID, in list: [Task]) -> IndexPath {
let row = Int(list.firstIndex(where: { $0.id == id }) ?? 0)
return IndexPath(row: row, section: 0)
}
@IBAction func addTaskButton(_ sender: UIBarButtonItem) {
goToEditTask(createTask())
}
private func goToEditTask(_ task: Task) {
let controller = storyboard?.instantiateViewController(identifier: TaskDetailsViewController.identifier) as! TaskDetailsViewController
controller.task = task
controller.delegate = self
navigationController?.pushViewController(controller, animated: true)
}
// MARK:- Methods to implement
private func createTask() -> Task {
let task = CoreDataManager.shared.createTask()
// Update table
allTasks.insert(task, at: 0)
tableView.insertRows(at: [IndexPath(row: 0, section: 0)], with: .automatic)
return task
}
private func fetchTasksFromStorage() {
allTasks = CoreDataManager.shared.fetchTasks()
}
private func deleteTaskFromStorage(_ task: Task) {
deleteTaskSviped(with: task.id)
CoreDataManager.shared.deleteTask(task)
}
}
//UITableViewDelegate, UITableViewDataSource
extension TasksViewController: UITableViewDelegate,UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if doneTasksCheck == true {
if currentSearch == "" {
filteredTasks = doneTasks.sorted { $0.taskDate > $1.taskDate }
}
} else {
if currentSearch == "" {
filteredTasks = currentTask.sorted { $0.taskDate < $1.taskDate }
}
}
return filteredTasks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: idTasksCell, for: indexPath) as! TaskTableViewCell
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd.MM.YYYY"
cell.taskLabel.text = filteredTasks[indexPath.row].task
cell.taskDateLabel.text = dateFormatter.string(from: filteredTasks[indexPath.row].taskDate)
if filteredTasks[indexPath.row].taskDate < Date().onlyDate! {
cell.taskDateLabel.textColor = .red
} else {
cell.taskDateLabel.textColor = .black
}
cell.taskTegLabel.text = filteredTasks[indexPath.row].taskTag
if filteredTasks[indexPath.row].taskReminder != nil {
cell.taskRemindTimeLabel.isHidden = false
dateFormatter.dateFormat = "HH:mm"
cell.taskRemindTimeLabel.text = dateFormatter.string(from: filteredTasks[indexPath.row].taskReminder!)
} else {
cell.taskRemindTimeLabel.isHidden = true
}
if filteredTasks[indexPath.row].taskNote == nil || filteredTasks[indexPath.row].taskNote == "" {
cell.taskNoteLabel.isHidden = true
} else {
cell.taskNoteLabel.isHidden = false
}
if filteredTasks[indexPath.row].taskIsDone == false {
cell.taskDoneButton.setBackgroundImage(UIImage(systemName: "circle"), for: .normal)
} else {
cell.taskDoneButton.setBackgroundImage(UIImage(systemName: "chevron.down.circle.fill"), for: .normal)
}
cell.layer.masksToBounds = true
cell.layer.cornerRadius = 15
cell.layer.borderWidth = 2
cell.layer.borderColor = UIColor.white.cgColor
cell.selectionStyle = .none
cell.cellTaskDelegate = self
cell.index = indexPath
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 75
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
goToEditTask(filteredTasks[indexPath.row])
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
deleteTaskFromStorage(filteredTasks[indexPath.row])
}
}
}
extension TasksViewController {
func setConstraints() {
view.addSubview(tableView)
NSLayoutConstraint.activate([
tableView.topAnchor.constraint(equalTo: view.topAnchor, constant: 0),
tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 10),
tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -10),
tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0)
])
}
}
// MARK:- TaskNotes Delegate
extension TasksViewController: TaskNotesDelegate {
func refreshTasks() {
allTasks = allTasks.sorted { $0.taskDate < $1.taskDate }
currentTask = currentTask.sorted { $0.taskDate < $1.taskDate }
tableView.reloadData()
}
func deleteTaskSviped(with id: UUID) {
let indexPath = indexForTask(id: id, in: filteredTasks)
filteredTasks.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .automatic)
// just so that it doesn't come back when we search from the array
allTasks.remove(at: indexForTask(id: id, in: allTasks).row)
}
}