Keyboard

Keyboard1.swift

func registerKeyboardNotifications() {
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChangeFrame(_:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
}

@objc func keyboardWillShow(_ notification: Foundation.Notification) {
    guard let userInfo = notification.userInfo else {
        return
    }
    
    let keyboardSize = (userInfo[UIKeyboardFrameEndUserInfoKey] as AnyObject).cgRectValue.size
    
    // Then you update your view based on keyboardSize.height…
}

@objc func keyboardWillHide(_ notification: Foundation.Notification) {
    // Revert your view back to the default non-keyboard state…
}