UIViewController+Insets is an iOS category for UIViewController that calculates layout insets for a view inside a view controller obstructed by translucent bars.
It looks up the view controller hierarchy, so it will also determine insets for a child view controller that is obstructed by a translucent navigation or tab bar from a parent view controller.
Inside your view controller, simply call the insetsForView: method with the view you want to get insets for.
It's recommended to do this in the viewWillLayoutSubviews: method.
// 'self' is a UIViewController
const UIEdgeInsets insets = [self insetsForView:self.scrollView];
self.scrollView.contentInset = insets;
UIViewController+Insets is compatible with both iOS 6 and iOS 7.