Can I copy a storyboard from one project to another project?

As @Muhammad said you can and it is very simple!

• You just have to drag the Storyboard file from one project to another and select all options (The same procedure as importing anything else!).
• Next, you just need to go to your project options by clicking on the project icon in the left upper side of project navigator.
• Then you just need to select this storyboard to be your storyboard and that's it.

Yes you can, just make sure they are selected as your main storyboards as per image below.

Method 1

Select the View Controller in the storyboard and press Command + C to copy. Then press Command + V to paste in the second storyboard. Check the document outline to see where it was pasted to.

Method 2

Right click the storyboard file in the Project Navigator and select Open As > Source Code. Scroll down the XML code until you find your View Controller. It will look something like this:

<!--My View Controller-->
<scene sceneID="tne-QT-ifu">
    ...
</scene>

Copy this and paste it in the second project's storyboard file.

Notes

• You must also copy over the view controller swift file, of course, but the outlets shouldn't need to be reconnected.