UISearchController causes black screen Swift 2.0

Question

I have a strange problem in iOS 9 with Swift 2.0. I added UISearchController in my tableViewController but it causes a strange black screen problem. When I press the search bar and write something it shows my filtered results without any problem but when I tap another tab bar button like Bookmarks and after that when I tap tableViewController which is Most Viewed again it shows black screen like screen shot.

There is my 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()
    }
}

This is the black screen image from iOS 9 simulator same as real device.

I think its deiniting my tableView when I tap the searchBar and it can't init again. Is this a bug or something ?

How can I solve this problem ?

Thank you !

Answer 1

Friend, in your viewDidLoad() insert this code line:

self.definesPresentationContext = true

See how I put (line 29):

click here to see

Answer 2

I recently faced the same issue and I could fix it easily. self.definesPresentationContext = true was already defined in viewDidLoad() but it didn't solve this issue.

In the above question, maybe you show CitiesTableViewController directly when you tap MostViewed tabbar item.

In order to avoid the black screen, you can embed CitiesTableViewController in a UINavigationController and try to show the navigationcontroller when tapping the tabbar item.

This solution will avoid the black screen issue.