I started with a singleview app. I then embedded a navigationcontroller. At the bottom of the scene1, there is a bar. It isn't anything I put there. It doesn't show in the document outline but does obscure UI elements that I drag to the bottom of the view.

However, once I run the app, the bar is not visible. Anyone know what this bar is?

![enter image description here](https://i.stack.imgur.com/oRSGo.png)