Prevent UIScrollView from cancelling touchesMoved: of subview?

I have a UIScrollView. On top of it I allow the user to add a DraggableView (a subclass of UIImageView) by applying a long press gesture to the UIScrollView. The DraggableView overrides touchesMoved: and allows the user to drag the view around. This works until either one of two cases happens:

• The UIScrollView detects another long press while the user moves (after all his finger has been on the screen for a while)
• The UIScrollView starts to scroll.

What is the best way to prevent the long press detection and the开发者_StackOverflow scrolling of the scroll view while the user is dragging my view around? Is there a built in mechanism or do I have to keep track of a status somewhere and react accordingly?

Replies in ObjC and Monotouch are both welcome.

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Figured it out meanwhile. UIScrollView has a property do enable or disable scrolling. I just set that and enable scrolling again once my long press has been handled.