Finding auto layout information is difficult. The steps below pin a navigation bar to the top of the screen for all iOS devices.

Steps
- Make sure “Navigation Bar” is selected on the left menu
 - Click the “Pin” button on the bottom right corner
 - Click the top, left and right constraints
 - Click the Height constraint
 - Add the 4 contraints
 
The above steps “pin” the navigation bar object to the top of the view and stretch the navigation bar to the sides of the view. The height constraint keeps a static height for the navigation bar.
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