Search Bar Glitch - ios

Question

The problem:
Instead of adding a search bar(with a search and results controller) to a table view controller, I have added it to a regular view controller's navigation bar. At first everything seems fine, but when I click on the search bar the screen turns gray.
This is my code:
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UISearchResultsUpdating, UISearchBarDelegate{
var schools = ["Saratoga", "Fremont", "Argonaut", "Redwood", "Foothill", "Miller", "Rolling Hills"].sorted()
var filteredSchools = ["Saratoga", "Fremont", "Argonaut", "Redwood", "Foothill", "Miller", "Rolling Hills"].sorted()
var searchController: UISearchController!
var resultsController: UITableViewController!
override func viewDidLoad() {
super.viewDidLoad()
resultsController = UITableViewController()
searchController = UISearchController(searchResultsController: resultsController)
resultsController.tableView.delegate = self
resultsController.tableView.dataSource = self
searchController.searchResultsUpdater = self
self.view.addSubview(searchController.searchBar)
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: searchController.searchBar)
}
func updateSearchResults(for searchController: UISearchController) {
let currText = searchController.searchBar.text ?? ""
filteredSchools = schools.filter({ (school) -> Bool in
if school.contains(currText){
return true
}
return false
})
resultsController.tableView.reloadData()
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredSchools.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = filteredSchools[indexPath.row]
return cell
}
}

Answer 1

Add these lines in viewDidLoad:
resultsController.tableView.backgroundColor = UIColor.clear
searchController.hidesNavigationBarDuringPresentation = false
Your Navigation Bar is hiding that's all.
If you don't want the gray tint:
searchController.dimsBackgroundDuringPresentation = false