gistfile1.j

var mainViewBounds = [[[CPApp delegate] mainView] bounds],
            scrollViewSize = CGRectMake(
                mainViewBounds.origin.x,
                mainViewBounds.origin.y + 100.0,
                mainViewBounds.size.width,
                mainViewBounds.size.height - 100.0
            ),
            scrollView = [[CPScrollView alloc] initWithFrame:scrollViewSize];

var bounds = CGRectMakeCopy([[[CPApp delegate] mainView] bounds]);
bounds.origin.y += 100.0;
bounds.size.height -= 100.0;

var scrollView = [[CPScrollView alloc] initWithFrame:bounds];

var scrollView = [[CPScrollView alloc] initWithFrame:CGRectInset([[[CPApp delegate] mainView] bounds], 0.0, 100.0)];