如何快速处理软键盘

问题描述 投票:0回答:2

我正在使用聊天应用程序。而且在我的应用中,当键盘出现或键盘出现在屏幕上时,我不想隐藏顶部导航栏。我正在使用以下代码实现我的目标。

 @objc func keyboardWillShow(notification: NSNotification) {
    var  newYpos = CGFloat()
    let rate = notification.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! NSNumber
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        self.customView.tableView.contentInset = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0)
        newYpos = keyboardSize.height
        //   print(newYpos)
        self.tap.isEnabled = true
    }
    if self.yPosAfterFirstNotif == 0.0{
        self.yPosAfterFirstNotif = newYpos
        UIView.animate(withDuration: rate.doubleValue, animations: {
            self.customView.bottomC.constant = (-self.yPosAfterFirstNotif)
        })
    }
    self.customView.tableView.contentInset = UIEdgeInsetsMake(0, 0, newYpos, 0)
    //scrollToBottom()
    self.customView.tableView.scrollToBottomm()
    self.customView.tableView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0)
}

这就是我隐藏键盘的方式

  @objc func keyboardWillHide(notification: NSNotification) {
          var  newYpos = CGFloat()
      let rate = notification.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! NSNumber
            if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue
            {
                 newYpos = keyboardSize.height
                 self.yPosAfterFirstNotif = newYpos
                self.customView.tableView.contentInset = UIEdgeInsetsMake(0, 0, newYpos, 0)
            }
            UIView.animate(withDuration: rate.doubleValue, animations: {
                self.customView.bottomC.constant = (+self.yPosAfterFirstNotif)
            })
            //  self.constraintCommentViewBottom.constant = 0
            self.yPosAfterFirstNotif = 0.0
            self.customView.tableView.contentInset = UIEdgeInsetsMake(0, 0, newYpos, 0)

        self.tap.isEnabled = false


        if self.customView.ChatTextField.text.characters.count == 0
        {
            self.customView.sendButton.isHidden = true
            self.customView.recordButton.isHidden = false
            self.customView.cameraButton.isHidden = false
            self.customView.textFieldTrailling.constant = 44
        }




    }

呈现键盘之前

enter image description here

显示键盘后

enter image description here

关闭键盘后

enter image description here需要帮忙谢谢

ios swift iphone keyboard uinavigationbar
2个回答
0
投票

我认为您在keyboardSize中的keyboardWillHide不正确,请尝试使用UIKeyboardFrameEndUserInfokey而不是UIKeyboardFrameBeginUserInfoKey


0
投票

请尝试添加以下代码来隐藏/显示键盘的隐藏/显示导航栏

此外,您还可以根据键盘大小以相同的方法管理滚动。

更新后的答案::您可以将约束设置为包含文本字段的视图底部,并在键盘show \ hide上对其进行更新。这个对我有用。

override func viewDidLoad() {
    super.viewDidLoad()
    NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)

}

@objc func keyboardWillShow(notification: Notification) {
     guard let userInfo = (sender as Notification).userInfo, let value = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
    let newHeight: CGFloat
    if #available(iOS 11.0, *) {
        newHeight = value.cgRectValue.height - view.safeAreaInsets.bottom
    } else {
        newHeight = value.cgRectValue.height
    }
    self.chatViewBottomConstraints.constant = newHeight
    DispatchQueue.main.async {
        self.tableView.scrollToBottom()
    }

}

@objc func keyboardWillHide(notification: Notification) {
 DispatchQueue.main.async {
        self.chatViewBottomConstraints.constant  = 0.0
        self.tableView.scrollToBottom()
    }
}
© www.soinside.com 2019 - 2024. All rights reserved.