FSCalendar searchbar disappears - tableview

Question

I'm using FSCalendar in my app. I placed the searchbar, which works properly with tableview below the FSCalendar. I select any row in the table and go to the next viewcontroller to edit selected row. As soon as I returned to the main VC (with FSCalndar), my searchbar disappeared. I have the same searchbar with tableview in other VC (without FSCalendar), and it works properly every time. My code for FSCalendar, tableview and searchbar are below.
Does anybody have any suggestions? Probably somebody faced with similar issue before?
Thanks in advance!
class CalendarViewController: UIViewController {
var calendarHeightConstraint: NSLayoutConstraint!
private var calendar: FSCalendar = {
let calendar = FSCalendar()
calendar.translatesAutoresizingMaskIntoConstraints = false
return calendar
}()
let tableView: UITableView = {
let tableView = UITableView()
tableView.translatesAutoresizingMaskIntoConstraints = false
return tableView
}()
let searchController = UISearchController(searchResultsController: nil)
var currentSearch = ""
override func viewDidLoad() {
super.viewDidLoad()
calendar.delegate = self
calendar.dataSource = self
calendar.scope = .week
calendar.firstWeekday = 2
tableView.delegate = self
tableView.dataSource = self
tableView.separatorStyle = .none
tableView.register(CalendarTableViewCell.self, forCellReuseIdentifier: idCalendarCell)
configureSearchBar()
setConstraints()
}
private func configureSearchBar() {
searchController.searchBar.delegate = self
searchController.delegate = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "search for events"
navigationItem.searchController = searchController
definesPresentationContext = true
}
extension CalendarViewController: UITableViewDelegate,UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredEvents.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: idCalendarCell, for: indexPath) as! CalendarTableViewCell
.................. (code)
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 75
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
goToEditEvent(filteredEvents[indexPath.row])
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
.......... (code)
}
}
}
extension CalendarViewController: FSCalendarDataSource, FSCalendarDelegate {
func calendar(_ calendar: FSCalendar, boundingRectWillChange bounds: CGRect, animated: Bool) {
calendarHeightConstraint.constant = bounds.height
view.layoutIfNeeded()
}
func calendar(_ calendar: FSCalendar, didSelect date: Date, at monthPosition: FSCalendarMonthPosition) {
selectedDate = date
refreshEvent()
}
func calendar(_ calendar: FSCalendar, numberOfEventsFor date: Date) -> Int {
for i in 0..<allEvents.count {
if date.onlyDate == allEvents[i].eventDate.onlyDate {
return 1
}
}
return 0
}
}
extension CalendarViewController {
func setConstraints() {
view.addSubview(calendar)
calendarHeightConstraint = NSLayoutConstraint(item: calendar, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 300)
calendar.addConstraint(calendarHeightConstraint)
NSLayoutConstraint.activate([
calendar.topAnchor.constraint(equalTo: view.topAnchor, constant: 130),
calendar.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 0),
calendar.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: 0),
])
view.addSubview(showHideButton)
NSLayoutConstraint.activate([
showHideButton.topAnchor.constraint(equalTo: calendar.bottomAnchor, constant: 0),
showHideButton.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 15),
showHideButton.widthAnchor.constraint(equalToConstant: 200),
showHideButton.heightAnchor.constraint(equalToConstant: 20)
])
view.addSubview(tableView)
NSLayoutConstraint.activate([
tableView.topAnchor.constraint(equalTo: showHideButton.bottomAnchor, constant: 10),
tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 10),
tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -10),
tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0)
])
}
}
'''