There could be deletion of Application scene from storyboard. This happens with me as well. So in this case, you can create a new empty project and follow steps below -
- Open Main.storyboard file as source code.
- Start copying after . From to . After this you will find
- Replace copied code to your project file in same way you did for copying, that is after and before and DONE
- Verify this my opening storyboard file in interface builder, you will see Application scene is connected.
You can change title by clicking on it and can change top menu as well.