When using hidesBottomBarWhenPushed, i want the tab bar to reappear when i push another view

Question

I have a navigation controller. For one of the views i want to hide the bottom tab bar, so it gets the max possible screen real estate. To do this, i have:

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Answer 1

In a root view controller "A" (which is showing the tabBar), when it comes time to show another view controller "B" where no tabBar is wanted:

self.hidesBottomBarWhenPushed = YES; // hide the tabBar when pushing B
[self.navigationController pushViewController:viewController_B animated:YES];
self.hidesBottomBarWhenPushed = NO; // for when coming Back to A

In view controller B, when it comes time to show a third view controller C (tabBar wanted again):

self.hidesBottomBarWhenPushed = NO; // show the tabbar when pushing C
[self.navigationController pushViewController:viewController_C animated:YES];
self.hidesBottomBarWhenPushed = YES; // for when coming Back to B