键盘在 tableview interactive 上关闭非常有问题

Question

我在 tableviewcontroller 内有一个文本字段，当我向下拖动键盘时它在 tabbarcontroller 内，它在关闭之前滞后。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。然而，当我向下拖动键盘时，它在被解雇之前会滞后

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 class，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

因为 tableviews 继承自 ScrollViews，所以您可以覆盖 scrollview 方法 "scrollViewWillEndDragging" 并调用 endEditing(true)

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

        }

你甚至可以做得更多您可以使用函数签名的速度参数检测用户何时向上或向下滚动，如下所示：

向上

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

向下

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

Answer 2

母鹿，

你做的是对的，我不认为这是一个问题，甚至联系人应用程序也有与你的相同的功能（即 [=24= 中的文本字段） ] 看法）。联系人应用程序也以同样的方式运行

找到联系人app和你的对比录屏，

.

如果您仍然想修复它，我建议您删除自动更正，如果您的要求允许的话。

textView.autocorrectionType = .no

Answer 3

我用 iOS 12 启动了你的应用程序，它工作正常。

此解决方案可能会帮助您 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) 添加函数getKeyboardWindow()

private func getKeyboardWindow() -> UIWindow? {

    for window in UIApplication.shared.windows {

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

    return nil
}

3) 添加函数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。

但在这种情况下，我不知道更优雅的解决方案。

Answer 4

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

键盘在 tableview interactive 上关闭非常有问题

Keyboard dismiss very buggy on tableview interactive

lag

uitableview

uikeyboard

ios

swift