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Development environment

xcode9.4.1
swift4

After selecting CSV in the file app, you may see the following screen,
I'm looking for ways to add my app to this list of selectable apps.
I tried various things on my own, but I can't find a page that matches my intention, whether the search is bad.
Isn't it possible to borrow the wisdom of someone because it can be very helpful even if you provide a link to a Web page that can be used as a reference, even if it is a specific method?