- (void)keyboardWillShow:(NSNotification *)notification {
    [self.view layoutIfNeeded];
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    self.postButtonBotConstraint.constant = keyboardSize.height;
    [UIView animateWithDuration:[notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] delay:0.0 options:[notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue] << 16 animations:^{
        [self.view layoutIfNeeded];
    } completion:nil];
}

- (void)keyboardWillBeHidden:(NSNotification *)notification {
    self.postButtonBotConstraint.constant = 0;
    [UIView animateWithDuration:[notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] delay:0.0 options:[notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue] << 16 animations:^{
        [self.view layoutIfNeeded];
    } completion:nil];
    //    [self.scrollView setContentOffset:(CGPoint){0, 0} animated:YES];
}