// Swift let s = self.window!.rootViewController as! UISplitViewController let n = s.viewControllers[s.viewControllers.count-1] as! UINavigationController n.topViewController!.navigationItem.leftBarButtonItem = s.displayModeButtonItem()
// Objective-C id s = self.window.rootViewController; id n = [s viewControllers][[s viewControllers].count-1]; [n topViewController].navigationItem.leftBarButtonItem = s.displayModeButtonItem;
