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];
}

[self.scrollView setContentOffset:CGPointMake(0.0, 0.0) animated:YES];

and

[self.scrollView setContentOffset:CGPointMake(0.0, keyboardFrame.size.height/2) animated:YES];

may not fit in your case.

If you find the editing position from ScrollView is too high after setContentOffset. Then, remove these two lines.

I have not checked the behavior when applying on UITableView. But, basically, make contentInset changed is necessary.

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