self.performSegue(withIdentifier: "teacherDetail", sender: self) needs two taps - ios

Question

I'm trying to segue from a search result in a tableview controller in swift 3 but when I use self.performSegue(withIdentifier: "teacherDetail", sender: self) it seems to hang when selecting a cell. If I tap the first cell it will show gray like it is selected, and then won't do anything unless I select another cell. Then, it will preform the segue to the detail view controller with the information from the first cell.
import UIKit
var name = ""
class DirectoryTC: UITableViewController, UISearchResultsUpdating {
var teachers = ["Mr. Delano", "Mr. Antani", "Mr. Botelho", "Mr. Braga"]
var filteredTeachers = [String]()
var searchController: UISearchController!
var resultsController = UITableViewController()
override func viewDidLoad() {
super.viewDidLoad()
self.resultsController.tableView.dataSource = self
self.resultsController.tableView.delegate = self
self.searchController = UISearchController(searchResultsController: self.resultsController)
self.tableView.tableHeaderView = self.searchController.searchBar
self.searchController.searchResultsUpdater = self
definesPresentationContext = true
}
func updateSearchResults(for searchController: UISearchController) {
self.filteredTeachers = self.teachers.filter{ (teacher:String) -> Bool in
if teacher.lowercased().contains(self.searchController.searchBar.text!.lowercased())
{
return true
}else
{
return false
}
}
self.resultsController.tableView.reloadData()
}
// MARK: - Table view data source
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == self.tableView
{
return self.teachers.count
}else
{
return self.filteredTeachers.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = UITableViewCell()
if tableView == self.tableView
{
cell.textLabel?.text = self.teachers[indexPath.row]
}else
{
cell.textLabel?.text = self.filteredTeachers[indexPath.row]
}
return cell
}
override func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
DispatchQueue.main.async(){
if tableView == self.tableView
{
name = self.teachers[indexPath.row]
}else
{
name = self.filteredTeachers[indexPath.row]
}
self.performSegue(withIdentifier: "teacherDetail", sender: self)
}
}
}
And here is the swift file for the view controller I'm trying to segue to.
import UIKit
class DirectoryDetailVC: UIViewController{
#IBOutlet weak var test: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
test.text = name
}
}

Answer 1

make sure that your story board View Controller name is teacherDetail - use
DispatchQueue.main.async { self.performSegue(withIdentifier: "teacherDetail", sender: self)}
instead of
self.performSegue(withIdentifier: "teacherDetail", sender: self)

Answer 2

rmaddy caught it. It was a typo. "Typo - change didDeselectRowAtlectRowAt to didSelectRowAt"