隐藏键盘 Swift

Question

我有一个带有 TableView 的 ViewController 和一个负责发布评论的较低视图。 我想通过单击除底部视图以外的任何地方来隐藏键盘。 但是目前，即使您单击发送消息按钮，键盘也是隐藏的，并且没有发送消息。

Answer 1

你可以这样做：

    extension UITableView {

        open override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
            self.superview?.endEditing(true) // should be a path to top most view
            super.touchesBegan(touches, with: event)
        }
    }

或者您可以从UITableView创建一个子类并应用于该特定的 tableView。

另一种变体是在每次键盘出现时添加透明覆盖，并在其上添加点击操作 - 关闭键盘并移除覆盖，但在这种情况下，除非您关闭键盘，否则表格将无法滚动。

Answer 2

override func hideKeyboard() {
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(tableViewTap(gestureRecognizer:)))
    tapGesture.cancelsTouchesInView = false
    view.addGestureRecognizer(tapGesture)
}

@objc func tableViewTap(gestureRecognizer: UITapGestureRecognizer) {
    textInputBar.commentTextField.endEditing(true)
}

@objc func handleKeyboardNotifications(notification: Notification) {

    if let userInfo = notification.userInfo {
        guard let keyboardFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else { return }
        print(keyboardFrame)
        let isKeyboardShowing = notification.name == UIResponder.keyboardWillShowNotification
        bottomSendCommentViewConstraint.constant = isKeyboardShowing ? keyboardFrame.height - 83 : 5
        bottomTableViewConstraint.constant = isKeyboardShowing ? keyboardFrame.height - 83 : 0

        UIView.animate(withDuration: 0, delay: 0, options: .curveEaseOut, animations: {
            self.view.layoutIfNeeded()
        }, completion: nil)
    }
}

private func keyboardNotifications() {
    NotificationCenter.default.addObserver(self,
                                           selector: #selector(handleKeyboardNotifications(notification:)),
                                           name: UIResponder.keyboardWillShowNotification,
                                           object: nil)
    NotificationCenter.default.addObserver(self,
                                           selector: #selector(handleKeyboardNotifications(notification:)),
                                           name: UIResponder.keyboardWillHideNotification,
                                           object: nil)
}