The category we use in Velocity for adjusting a scroll view's insets when the keyboard shows and hides - behavior which used to be automatic in iOS 6 and is now manual in iOS 7. Call this method from observing both `UIKeyboardWillHideNotification` and `UIKeyboardWillShowNotification`.

UIViewController+LCKAdditions.m

@implementation UIViewController (LCKAdditions)

- (void)adjustScrollView:(UIScrollView *)scrollView forKeyboardChangeNotification:(NSNotification *)notification {
    NSDictionary *keyboardInfo = [notification userInfo];
    CGRect keyboardFrame = [[keyboardInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
    CGRect convertedFrame = [scrollView.superview convertRect:keyboardFrame fromView:scrollView.window];
    CGFloat keyboardHeight = CGRectGetHeight(convertedFrame);
    
    UIEdgeInsets contentInsets = scrollView.contentInset;
    
    if ([notification.name isEqualToString:UIKeyboardWillShowNotification]) {
        contentInsets.bottom = keyboardHeight;
    }
    else if ([notification.name isEqualToString:UIKeyboardWillHideNotification]) {
        contentInsets.bottom = self.bottomLayoutGuide.length;
    }
    
    scrollView.contentInset = contentInsets;
    scrollView.scrollIndicatorInsets = contentInsets;
}

@end