title: UISplitViewController drag thumbnail onto detail view
body: <p>Is it possible to create an effect of dragging a thumbnail from the master view (collection of jpegs) onto the detail view, as if the jpeg is hovering across the boundary of both when you select and drag it across?  I have had a think about it and tried creating a view that encompasses both as a subview with a clear background but it seems theoretically unworkable. </p>