Dragging view if scrollview not at top

[cmatcb4b]

How can I set it so that the user can still drag the view controller even if scrollView isn't scrolled all the way to the top?
I'm using a tableView in the modal, and it only takes up the bottom half of the screen, so it seems rather tedious for the user to scroll all the way to the top of the scrollview just to push the controller down.