Manage Keyboard in Chat View - ios

Question

I have a controller like chat view, with one textfield and button and table view. I want to when user tap to textfield textfield go up and scroll to end of list. there is my code :
#objc func keyboardWillChangeFrame(_ notification: Notification) {
let keyboardFrame = ((notification as NSNotification).userInfo![UIKeyboardFrameEndUserInfoKey]! as AnyObject).cgRectValue
print("*****************")
print((keyboardFrame?.height)!)
//emoji keyboard size is 258
if (keyboardFrame?.height)! == 258 {
textBackViewBottom.constant = 52
}
else {
textBackViewBottom.constant = 10
}
}
#objc func keyboardWillShow(_ notification: Notification) {
// Check for double invocation
if _keyboardShown {
return
}
_keyboardShown = true
// Reducing size of table
let baseView = self.view
let keyboardFrame = ((notification as NSNotification).userInfo![UIKeyboardFrameBeginUserInfoKey]! as AnyObject).cgRectValue
print("////////////////////")
print((keyboardFrame?.height)!)
let keyboardDuration = ((notification as NSNotification).userInfo![UIKeyboardAnimationDurationUserInfoKey]! as AnyObject).doubleValue
let visibleRows = tableView.indexPathsForVisibleRows
var lastIndexPath : IndexPath? = nil
if (visibleRows != nil) && visibleRows!.count > 0 {
lastIndexPath = visibleRows![visibleRows!.count-1] as IndexPath
}
UIView.animate(withDuration: keyboardDuration!, delay: 0.0, options: UIViewAnimationOptions.curveEaseOut, animations: {
baseView!.frame = CGRect(x: baseView!.frame.origin.x, y: baseView!.frame.origin.y, width: baseView!.frame.size.width, height: baseView!.frame.size.height - (keyboardFrame?.size.height)!)
}, completion: {
(finished: Bool) in
if lastIndexPath != nil {
// Scroll down the table so that the last
// visible row remains visible
self.tableView.scrollToRow(at: lastIndexPath!, at: UITableViewScrollPosition.bottom, animated: true)
}
})
}
#objc func keyboardWillHide(_ notification: Notification) {
// Check for double invocation
if !_keyboardShown {
return
}
_keyboardShown = false
// Expanding size of table
//
let baseView = self.view
let keyboardFrame = ((notification as NSNotification).userInfo![UIKeyboardFrameBeginUserInfoKey]! as AnyObject).cgRectValue
let keyboardDuration = ((notification as NSNotification).userInfo![UIKeyboardAnimationDurationUserInfoKey]! as AnyObject).doubleValue
UIView.animate(withDuration: keyboardDuration!, delay: 0.0, options: UIViewAnimationOptions.curveEaseOut, animations: {
baseView!.frame = CGRect(x: baseView!.frame.origin.x, y: self.view.frame.origin.y, width: self.view.frame.size.width, height: self.view.frame.size.height + (keyboardFrame?.size.height)!)
}, completion: nil)
}
every thing work well with Iphone default keyboard, but when I'm using custom keyboard like Swiftkey my code is wrong and view broken.
How can get Update view when keyboard size and keyboard type change.
thanks for reply.