iosswiftuitableviewlaguikeyboard

Keyboard dismiss very buggy on tableview interactive


I have a textfield inside tableviewcontroller which is inside tabbarcontroller when i drag the keyboard down it lags right before dismiss. I am using the interactive mode so keyboard dismisses on drag.

class TempTableViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.keyboardDismissMode = .interactive
        self.clearsSelectionOnViewWillAppear = false
        tableView.register(TitleTableViewCell.self, forCellReuseIdentifier: "reuseIdentifier")
    }


    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath) as! TitleTableViewCell
        return cell
    }

    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return UITableView.automaticDimension
    }

    override func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
        return UITableView.automaticDimension
    }
}

my tableviewcell has a uitextfield. however when i drag the keyboard down it lags before being dismissed

class TitleTableViewCell: UITableViewCell {


    let titleView: UITextField = {
       let textView = UITextField()
        textView.text = "Add your title ... "
        textView.font = UIFont.preferredFont(forTextStyle: .body)
//        textView.sizeToFit()
//        textView.isScrollEnabled = false
        textView.translatesAutoresizingMaskIntoConstraints=false
        return textView
    }()

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)

        self.contentView.addSubview(titleView)
        setTitleViewConstraints()
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }

    func setTitleViewConstraints(){
        titleView.leadingAnchor.constraint(equalTo: self.contentView.leadingAnchor,constant: 10).isActive=true
        titleView.trailingAnchor.constraint(equalTo: self.contentView.trailingAnchor,constant: -10).isActive=true
        titleView.topAnchor.constraint(equalTo: self.contentView.topAnchor, constant: 10).isActive=true
        titleView.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor,constant: -10).isActive=true
    }

}

class tabBarViewController: UITabBarController, UITabBarControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        let homeViewController = HomeViewController()
        homeViewController.tabBarItem = UITabBarItem(title: nil, image: UIImage(named: "home-tab")?.withRenderingMode(.alwaysOriginal), selectedImage: nil)
        let discoverViewController = DiscoverViewController()
        discoverViewController.tabBarItem = UITabBarItem(title: nil, image: UIImage(named: "discover-tab")?.withRenderingMode(.alwaysOriginal), selectedImage: nil)
        let notificationViewController = NotificationViewController()
        notificationViewController.tabBarItem = UITabBarItem(title: nil, image: UIImage(named: "notification-tab")?.withRenderingMode(.alwaysOriginal), selectedImage: nil)
        let tempViewController = TempTableViewController()
        tempViewController.tabBarItem = UITabBarItem(title: nil, image: UIImage(named: "profile-tab")?.withRenderingMode(.alwaysOriginal), selectedImage: nil)


        let tabBarList = [homeViewController, discoverViewController,notificationViewController,tempViewController ]

            self.viewControllers = tabBarList.map { viewController in

            return UINavigationController(rootViewController: viewController)

        }
    }

}

this is the appdelegate class where tabbarcontroller is selected based on user credentials

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?
    var handle: AuthStateDidChangeListenerHandle?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        FirebaseApp.configure()
        UINavigationBar.appearance().isOpaque = false
        UINavigationBar.appearance().backgroundColor = .white
        window = UIWindow(frame: UIScreen.main.bounds)
        checkUserStatus()
        return true
    }

    func checkUserStatus(){
        window?.backgroundColor = UIColor.white
        self.setupRootViewController(viewController: UIViewController())
        handle = Auth.auth().addStateDidChangeListener {[weak self] auth,user in
            if(user != nil){
                self?.setupRootViewController(viewController: tabBarViewController())
            }else{
                self?.setupRootViewController(viewController: UINavigationController(rootViewController: WelcomeViewController()))
            }
        }
    }
    private func setupRootViewController(viewController: UIViewController) {
        self.window!.rootViewController = viewController
        self.window!.makeKeyAndVisible()
    }

enter image description here


Solution

  • I launched your application with iOS 12 and it works correctly.

    This solution may help you with iOS 13.

    1) Add the observer in viewDidLoad()

    override func viewDidLoad() {
        ...
    
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
    }
    

    2) Add function getKeyboardWindow()

    private func getKeyboardWindow() -> UIWindow? {
    
        for window in UIApplication.shared.windows {
    
            if (NSStringFromClass(type(of: window).self) == "UIRemoteKeyboardWindow") {
                return window
            }
        }
    
        return nil
    }
    

    3) Add function keyboardWillHide(notification:)

    @objc private func keyboardWillHide(notification: Notification) {
    
        guard let keyboardWindow: UIWindow = getKeyboardWindow() else { return }
    
        let screenWidth: CGFloat = UIScreen.main.bounds.width
        let screenHeight: CGFloat = UIScreen.main.bounds.height
    
        keyboardWindow.frame = CGRect(x: 0, y: 50, width: screenWidth, height: screenHeight)
    }
    

    P.S. However, I don't like to fix issues this way.

    But in this case, I don't know a more elegant solution.

    enter image description here