鍵盤上方的視圖未顯示

Question

當鍵盤顯示時，我想在鍵盤上方有一個帶textField和一個發送按鈕的View。 但這是行不通的。

我已經在代碼中實現了這一點：

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

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        tabBarController?.tabBar.isHidden = true
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        tabBarController?.tabBar.isHidden = false

    }

    // MARK: - Keyboard stuff
    @objc func keyboardWillShow(_ notification: NSNotification) {
        let keyboardFrame = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as AnyObject).cgRectValue   
        print("hier ist \(keyboardFrame!)")
        UIView.animate(withDuration: 0.1) {
            self.bottomConstraint.constant = keyboardFrame!.height     
            self.view.layoutIfNeeded()
        }
    }

    @objc func keyboardWillHide(_ notification: NSNotification) {
        UIView.animate(withDuration: 0.1) {
            self.bottomConstraint.constant = 0
            self.view.layoutIfNeeded()
        }
    }

Answer 1

簽出textField inputAccessoryView。 有一個教程在這里 ，說明你想要做什么。