Is there a way to change the height of a UINavigationBar in Storyboard without using a UINavigationController?

You can set the property barPosition to UIBarPositionTopAttached another way!

1. Add a delegate to your UINavigationBar.

2. Implement -positionForBar: in the delegate class:

   - (UIBarPosition)positionForBar:(id<UIBarPositioning>)bar
   {
       return UIBarPositionTopAttached;
   }
   

Your navigation bar’s top must also be anchored to the Top Layout Guide.