Resizing tableview to accomodate keyboard

Resizing.m

- (void)resizeTableViewWithHeightOffset:(CGFloat)offsetHeight 
                      animationDuration:(double)animationDuration 
                             completion:(void (^)(BOOL))completionHandler
{
  [UIView animateWithDuration:animationDuration animations:^{
    CGRect frame = self.tableView.frame;
    frame.size.height += offsetHeight;
    self.tableView.frame = frame;
  } completion:completionHandler];
}

- (void)keyboardWillShow:(NSNotification *)note
{
  CGRect keyboardFrame = [[note.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
  double animationDuration = [[note.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
  CGFloat offsetHeight = keyboardFrame.size.height - self.tabBarController.tabBar.frame.size.height;
  [self resizeTableViewWithHeightOffset:-offsetHeight animationDuration:animationDuration completion:^(BOOL complete) {
    [self.tableView scrollFirstResponderIntoView];
    [self setKeyboardShowing:YES];
  }];
}

- (void)keyboardWillHide:(NSNotification *)note
{
  CGRect keyboardFrame = [[note.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
  double animationDuration = [[note.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
  CGFloat offsetHeight = keyboardFrame.size.height - self.tabBarController.tabBar.frame.size.height;
  [self resizeTableViewWithHeightOffset:offsetHeight animationDuration:animationDuration completion:^(BOOL complete) {
    [self setKeyboardShowing:NO];
  }];  
}R