How to move StatView programmatically when keyboard shows - swift

Question

I have a login page which has two textviews and a button in a stackView
I'm trying to move the stackview when the keyboard shows and also disappears as I want to know how to do this programmatically

Answer 1

iOS sends 2 notifications when keyboard will show/hide
UIKeyboardWillShow
UIKeyboardWillHide
What you can do, is observe those notifications, and move the frame of your stackView such as
#objc func keyboardWillShow() {
if stackView.frame.origin.y == 0 {
stackView.frame.origin.y -= 200
}
}
#objc func keyboardWillHide() {
if stackView.frame.origin.y != 0 {
stackView.frame.origin.y = 0
}
}
And here is how to observe those notification. (use this code in your viewDidLoad function)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: Notification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: Notification.Name.UIKeyboardWillHide, object: nil)

Answer 2

Swift 4.2
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIWindow.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: UIWindow.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
print("keyboardWillShow")
}
#objc func keyboardWillHide(notification: NSNotification){
print("keyboardWillHide")
}
If still got any error check below link:
LINK FOR KEYBOARD HIDE/SHOW