UISearchBar resignFirstResponder not working - ios

Question

UIViewController needs to hide keyboard inside viewWillDisappear or viewDidDisappear methods. UIViewController stays in memory after disappearing and can be presented again. On first appearance UISearchBar is not firstResponder and keyboard is hidden. But if I pop UIViewController with keyboard shown and then push it again - keyboard is not hidden, however I call:
override func viewDidLoad() {
super.viewDidLoad()
instrumentsTableView.register(UINib(nibName: kDealsFilterInstrumentTableViewCellNib, bundle: nil), forCellReuseIdentifier: kDealsFilterInstrumentTableViewCellReusableId)
instrumentsTableView.dataSource = self
instrumentsTableView.delegate = self
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
if presenter.numberOfInstruments != 0 {
instrumentsTableView.scrollToRow(at: IndexPath(row: 0, section: 0), at: .top, animated: false)
}
KeyboardManager.shared.unsubscribe()
instrumentsSearchBar.text = ""
presenter.findInstruments(with: "") //just sets settings to default/ reloads data
instrumentsSearchBar.endEditing(true)
instrumentsSearchBar.resignFirstResponder()
view.endEditing(true)
view.resignFirstResponder()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
KeyboardManager.shared.subscribe(self)
}
KeyboardManager - sends notification if keyboard's state has changed, if relevant:
final class KeyboardManager {
private init() {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: Notification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: Notification.Name.UIKeyboardWillHide, object: nil)
}
static let shared = KeyboardManager()
#objc private func keyboardWillShow(_ notification: Notification) {
if let keyboardSize = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue {
let height = keyboardSize.cgRectValue.height
keyboardHeight = height
keyboardState = .shown
}
}
#objc private func keyboardWillHide(_ notification: Notification) {
keyboardHeight = 0
keyboardState = .hidden
}
private weak var subscriber: KeyboardManagerDelegate?
func subscribe(_ delegate: KeyboardManagerDelegate) {
subscriber = delegate
}
func unsubscribe() {
subscriber = nil
}
private var keyboardHeight: CGFloat = 0
private var keyboardState: KeyboardState = .hidden {
didSet {
if keyboardState != oldValue {
subscriber?.keyboardDidChange(state: keyboardState, height: keyboardHeight)
}
}
}
}
enum KeyboardState {
case shown
case hidden
}
protocol KeyboardManagerDelegate: class {
func keyboardDidChange(state: KeyboardState, height: CGFloat)
}
I've tried to use this code inside viewWillAppear and viewWillDisappear - but UISearchBar is still firstResponder. If I pop with keyboard being hidden - it stays hidden. What might be the problem?
Screencast:
Sample project with the same issue on bitbucket

Answer 1

For keyboard issue this will work fine,
self.view.endEditing(true)
Write this in viewWillDisappear or viewDidDisappear

Answer 2

I've tried your code: Sample project with the same issue on bitbucket and its working as expected and fine.
Here is that code.
class ViewController: UIViewController {
#IBAction func btnShowSearch(button: UIButton) {
if let search = self.storyboard?.instantiateViewController(withIdentifier: "SeachBarViewController") {
self.navigationController?.pushViewController(search, animated: true)
}
}
}
// SeachBarViewController
class SeachBarViewController: UIViewController {
#IBOutlet var searchBar: UISearchBar!
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
attemptToHidKeyboard()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
attemptToHidKeyboard()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
attemptToHidKeyboard()
}
override func didMove(toParentViewController parent: UIViewController?) {
if parent == nil {
attemptToHidKeyboard()
}
}
override func willMove(toParentViewController parent: UIViewController?) {
if parent == nil {
attemptToHidKeyboard()
}
}
private func attemptToHidKeyboard() {
self.searchBar.resignFirstResponder()
self.searchBar.endEditing(true)
self.view.resignFirstResponder()
self.view.endEditing(true)
}
}
Here is result: