Could you show code for
hideStrikeTextLayer()
and
strikeThroughText()
Note that you could simplify code:
				if dummyData[indexPath.row].done == false {
						dummyData[indexPath.row].done = true
						todoTableView.reloadRows(at: [index], with: .none)
				} else {
						dummyData[indexPath.row].done = false
						todoTableView.reloadRows(at: [index], with: .none)
				}
with
dummyData[indexPath.row].done.toggle()
todoTableView.reloadRows(at: [index], with: .none)
Also try to call reloadRows in a
		DispatchQueue.main.async {
}
as you did for reloadData()
When you paste code, please use Paste and Match Style, to avoid all the extra lines that make it nearly impossible to read.
import UIKit
import SwipeCellKit
import StrikethroughLabel
class ViewController: UIViewController {
		private var todoTableView	 = UITableView()
		private var searchBar			 = UISearchBar()
		
		private var dummyData = [Data(item: "Go to shopping", done: false),
														 Data(item: "Go to school", done: false),
														 Data(item: "Buy milk", done: false),
														 Data(item: "Do homework", done: false),
														 Data(item: "Clean room", done: false),
														 Data(item: "Wash car", done: false)]
		
		override func viewDidLoad() {
				super.viewDidLoad()
				view.backgroundColor = .white
				title = "Todoist"
				
				setupViews()
		}
		
		private func setupViews() {
				view.addSubview(todoTableView)
				view.addSubview(searchBar)
				
				navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addItem))
				
				searchBar.translatesAutoresizingMaskIntoConstraints																												 = false
				searchBar.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 0).isActive	 = true
				searchBar.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 0).isActive					 = true
				searchBar.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: 0).isActive = true
				
				todoTableView.delegate					= self
				todoTableView.dataSource				= self
				todoTableView.register(TodoTableViewCell.self, forCellReuseIdentifier: "todoCell")
				
				//todoTableView.allowsSelection	 = true
				todoTableView.rowHeight					 = 70
				//todoTableView.separatorStyle		= .none
						
				todoTableView.translatesAutoresizingMaskIntoConstraints																										 = false
				todoTableView.topAnchor.constraint(equalTo: searchBar.bottomAnchor, constant: 0).isActive									 = true
				todoTableView.leftAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leftAnchor, constant: 0).isActive		 = true
				todoTableView.rightAnchor.constraint(equalTo: view.safeAreaLayoutGuide.rightAnchor, constant: 0).isActive	 = true
				todoTableView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 0).isActive = true
		}
		
		@objc private func addItem() {
				
				var dataFromTextField:UITextField?
				var addButton:UIAlertAction!
				
				let addItemBox = UIAlertController(title: "Add Item", message: .none, preferredStyle: .alert)
				addItemBox.addTextField { (item) in
						dataFromTextField = item
				}
				addButton = UIAlertAction(title: "Add", style: .cancel) { (action) in
						if let data = dataFromTextField?.text, !data.isEmpty {
								self.dummyData.append(Data(item: data, done: false))
						} else {
								self.dismiss(animated: true, completion: nil)
						}
						DispatchQueue.main.async {
								self.todoTableView.reloadData()
						}
				}
				addItemBox.addAction(addButton)
				present(addItemBox, animated: true, completion: nil)
		}
}
extension ViewController: UITableViewDataSource, UITableViewDelegate, SwipeTableViewCellDelegate {
		func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
				return dummyData.count
				
		}
		
		func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
				let todoCell = tableView.dequeueReusableCell(withIdentifier: "todoCell") as! TodoTableViewCell
				todoCell.dataLabel.text = dummyData[indexPath.row].item
				if (dummyData[indexPath.row].done == false) {
						todoCell.dataLabel.hideStrikeTextLayer()
				} else {
						todoCell.dataLabel.strikeThroughText()
				}
				todoCell.delegate = self // Not sure it is needed
				return todoCell
		}
		
		func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
				let index = IndexPath(row: indexPath.row, section: 0)
				if dummyData[indexPath.row].done == false {
						dummyData[indexPath.row].done = true
						todoTableView.reloadRows(at: [index], with: .none)
						
				} else {
						dummyData[indexPath.row].done = false
						todoTableView.reloadRows(at: [index], with: .none)
				}
		}
