ios – UISearchController导致黑屏Swift 2.0

有我的tableViewController;

import UIKit

class CitiesTableViewController: UITableViewController,UISearchResultsupdating {

// MARK: - Class Properties

private var cities = [String]()
private var veterinaries = [Veterinary]()
private var filteredVeterinaries = [Veterinary]()
private var resultSearchController: UISearchController!

// MARK: - TableViewController Life Cycle Methods

override func viewDidLoad() {
    super.viewDidLoad()
    self.getCitiesList()
    self.configureResultsSearchController()
}

override func viewDidDisappear(animated: Bool) {
    super.viewDidDisappear(animated)
    self.resultSearchController.active = false
}

// MARK: - Configuring Search Bar Controller

private func configureResultsSearchController() {
    self.resultSearchController = UISearchController(searchResultsController: nil)
    self.resultSearchController.searchResultsupdater = self
    self.resultSearchController.dimsBACkgroundDuringPresentation = false
    self.resultSearchController.hidesNavigationBarDuringPresentation = false
    self.resultSearchController.searchBar.sizeToFit()
    self.resultSearchController.searchBar.placeholder = "Klinik veya ilçe adı"
    self.tableView.tableHeaderView = self.resultSearchController.searchBar
}

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int { return 1 }
override func tableView(tableView: UITableView,numberOfRowsInSection section: int) -> Int {
    if self.resultSearchController.active { return self.filteredVeterinaries.count }
    else { return self.cities.count }
}

// MARK: - Table view Delegate Methods

override func tableView(tableView: UITableView,didSELEctRowATindexPath indexPath: NSIndexPath) {
    if (self.resultSearchController.activE) {
        self.performSegueWithIdentifier(Constants.ShowDetailViewControllerSeguEIDentifier,sender: nil)
    } else {
        self.performSegueWithIdentifier(Constants.ShowTownsTableViewControllerSeguEIDentifier,sender: nil)
    }
}

override func tableView(tableView: UITableView,cellForRowATindexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier(Constants.CellIdentifier,forIndexPath: indexPath)
    if (self.resultSearchController.activE) {
        cell.textLabel?.text = self.filteredVeterinaries[indexPath.row].name
        cell.detailTextLabel?.text = self.filteredVeterinaries[indexPath.row].address
        return cell
    } else {
        cell.textLabel?.text = self.cities[indexPath.row]
        return cell
    }
}

// MARK: - PARSE Query Methods

private func getCitiesList() {
    let parseQueries = ParseQueries()
    parseQueries.downloadListData() {
        (let parseResults) in
        if let veterinaries = parseResults as? [Veterinary] {
            self.veterinaries = veterinaries
            for vet in veterinaries {
                if let city = vet.city {
                    self.cities.append(city)
                }
            }
            dispatch_async(dispatch_get_main_queue()) {
                self.cities = HelperMethods().removeDuplicatesAndSort(array: self.cities)
                self.tableView.reloadData()
            }
        }
    }
}

// MARK: - UISearchController Delegate Methods

func updateSearchResultsForSearchController(searchController: UISearchController) {
    self.filteredVeterinaries.removeAll(keepCapacity: falsE)
    if let searchBarText = searchController.searchBar.text{
        let searchText = searchBarText.lowercaseString
        // Searching with Veterinary Name and Veterinary City
        self.filteredVeterinaries = self.veterinaries.filter({$0.name?.lowercaseString.rangeOfString(searchText) != nil})
        self.filteredVeterinaries += self.veterinaries.filter({$0.town?.lowercaseString.rangeOfString(searchText) != nil})
        tableView.reloadData()
    }
}

这是来自iOS 9模拟器的黑屏图像,与真实设备相同.

当我点击searchBar并且它无法再次启动时,我认为它会消除我的tableView.这是一个错误还是什么？

我怎么解决这个问题 ？

谢谢 ！