Moving UIView on top of Keyboard with AutoLayout - ios

Question

I have a chat view with UITableView on all of the screen and on the bottom of the screen there is a UIView that holds 2 UIButtons and UITextField.
What I want to do is when the user clicks on the UITextField and the keyboard shows, the view will change his location to the top of the keyboard. For some reason I think that the AutoLayout is preventing it from moving, how could I know?
This is what I did so far:
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(kbSize.height, 0.0, kbSize.height, 0.0);
self.tableChat.contentInset = contentInsets;
self.tableChat.scrollIndicatorInsets = contentInsets;
CGRect inputTextView = self.accessoryViewForChat.frame;
inputTextView.origin.y = inputTextView.origin.y - kbSize.height;
self.accessoryViewForChat.frame = inputTextView;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your app might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect, self.activeTextField.frame.origin) ) {
[self.tableChat scrollRectToVisible:self.activeTextField.frame animated:NO];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
self.tableChat.contentInset = contentInsets;
self.tableChat.scrollIndicatorInsets = contentInsets;
CGRect inputTextView = self.accessoryViewForChat.frame;
inputTextView.origin.y = inputTextView.origin.y + kbSize.height;
self.accessoryViewForChat.frame = inputTextView;
}
#pragma mark UITextFieldDelegate methods
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
self.activeTextField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.activeTextField = nil;
}