Update UITableView insets on keyboard changes

gistfile1.m

- (void)registerForNotifications
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardStateChanged:)
                                                 name:UIKeyboardDidShowNotification
                                               object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardStateChanged:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)keyboardStateChanged:(NSNotification*)notification;
{
    CGRect keyboardRect = CGRectZero;
    [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardRect];
    
    UIEdgeInsets newInsets = UIEdgeInsetsZero;
    if(notification.name == UIKeyboardDidShowNotification) {
        // thats only correct, if your view ends at the bottom of the screen
        // otherwise subtract the difference from the inset
        newInsets.bottom = keyboardRect.size.height;
    }
    
    [UIView animateWithDuration:0.5 animations:^{
        self.tableView.contentInset = newInsets;
        self.tableView.scrollIndicatorInsets = newInsets;
    }];
}