Using the storyboard I created a new screen for a second View controller and added a Toolbar at the bottom. But when the view is shown, the toolbar doesn't appear. I'm using Segue to change views.
What could be wrong?
If you're using a Navigation Controller, make sure to tick "Shows Toolbar" and add the buttons there, not on a standalone toolbar.
In order to show only on some, you'll need 2 different views, one that will hide it and another that won't and add the following to the respective view's viewWillAppear:
self.navigationController.toolbarHidden = YES;
(Set to YES to hide, NO to show)
You can play around with the Simulated Metrics on the Storyboard so as to visually simulate the run-time effect by setting Bottom Bar to either None or Toolbar instead of inferred, as appropriated.
EDIT: Check this sample project I made.