Question

我在tableviewcontroller内部有一个文本字段，当我向下拖动键盘时，它位于tabbarcontroller内部，在关闭前滞后。我正在使用交互模式，因此键盘在拖动时会消失。

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
    }
}

我的tableviewcell有一个uitextfield。但是，当我向下拖动键盘时，它会滞后于被关闭

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)

        }
    }

}

这是appdelegate类，其中根据用户凭据选择了tabbarcontroller

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()
    }

Answer 1

我使用 iOS 12 启动了您的应用程序，它可以正常运行。

此解决方案可能会帮助您使用 iOS 13 。

1）在viewDidLoad()

中添加观察者

override func viewDidLoad() {
    ...

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

2）添加功能getKeyboardWindow()

private func getKeyboardWindow() -> UIWindow? {

    for window in UIApplication.shared.windows {

        if (NSStringFromClass(type(of: window).self) == "UIRemoteKeyboardWindow") {
            return window
        }
    }

    return nil
}

3）添加功能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。但是，我不喜欢这样解决问题。

但是在这种情况下，我不知道更优雅的解决方案。

Answer 2

doe

您所做的是正确的，我认为这不是问题，即使通讯录应用也具有与您相同的功能（即表格视图中的文本字段）。联系人应用程序的行为也相同

找到联系人应用与您的比较屏幕录像，

。

如果您仍要修复它，建议您在需要时删除自动更正。

textView.autocorrectionType = .no

Answer 3

由于表视图是从ScrollViews继承的，因此您可以重写scrollview方法“ scrollViewWillEndDragging”并调用endEditing（true）

  override func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
                self.view.endEditing(true)

        }

，您甚至可以做更多您可以使用以下函数签名的速度参数检测用户何时向上或向下滚动：

上

 override func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
        if(velocity.y > 0){
            self.view.endEditing(true)
            self.view.layoutIfNeeded()
        }
    }

下

 override func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
            if(velocity.y < 0){
                self.view.endEditing(true)
                self.view.layoutIfNeeded()
            }
        }

Answer 4

您可以尝试设置空视图textView.inputAccessoryView = UIView()

键盘消除了TableView交互式上的非常多的错误

4 个答案: