SpltViewDelegate.m

/*Dealing with three-level hierarchy:

Feeds > Timeline > Article

Primary (master) is nav controller with Feeds and Timeline.

Secondary (detail) is nav controller with Article.

I get a reference to primary and secondary navigation controllers when app is launching.

Storyboard uses show segue for Feeds > Timeline. It uses showDetail segue for Timeline > Article.

This is probably not the final version of this code for my app, but so far it's doing what I want.*/


#pragma mark - UISplitViewControllerDelegate

- (UIViewController *)primaryViewControllerForCollapsingSplitViewController:(UISplitViewController *)splitViewController {

	return self.masterNavigationController;
}


- (UIViewController *)primaryViewControllerForExpandingSplitViewController:(UISplitViewController *)splitViewController {

	return self.masterNavigationController;
}


- (BOOL)splitViewController:(UISplitViewController *)splitViewController collapseSecondaryViewController:(UIViewController *)secondaryViewController ontoPrimaryViewController:(UIViewController *)primaryViewController {

	return YES;
}


- (UIViewController *)splitViewController:(UISplitViewController *)splitViewController separateSecondaryViewControllerFromPrimaryViewController:(UIViewController *)primaryViewController {

	return self.detailNavigationController;
}