Make UIScrollView go upward when the contained UITextField or UITextView becomes first responder.

ScollViewGoesUpByKeyboardNotifications.m

#pragma mark - Keyboard Notifications
- (void)keyboardDisappeared:(NSNotification*)notification
{
    self.scrollView.contentInset = UIEdgeInsetsZero;
    [self.scrollView setContentOffset:CGPointMake(0.0, 0.0) animated:YES];
}

- (void)KeyboardWillChangeFrame:(NSNotification*)notification
{
    NSDictionary *keyboardInfo = [notification userInfo];
    NSValue *keyboardFrameBegin = [keyboardInfo valueForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardFrame = [keyboardFrameBegin CGRectValue];
    
    self.scrollView.contentInset = UIEdgeInsetsMake(0.0f, 0.0f, keyboardFrame.size.height, 0.0f);
    [self.scrollView setContentOffset:CGPointMake(0.0, keyboardFrame.size.height/2) animated:YES];
}

Another way to set correct content offset is to get current first responder and set the content offset accordingly. About how to get current responder, you could refer to UIView+FirstResponder.swift