SGBDrillDownController is a parent view controller for the iPad which manages a stack of controllers similarly to UINavigationController while keeping the top two controllers visible similarly to UISplitViewController.
To use SGBDrillDownController in your project, add this line to your podfile:
pod 'SGBDrillDownController', '~> 1.0'
and then run:
$ pod install
for more information about pods and podfiles, visit the CocoaPods website.