Is there an inherent way for the text field to be able to automatically show the phone number using a format of (###) ###-####, or is that something I have to code myself?
You'll have to do it yourself.
But you'll find many examples, such as :
h ttps://stackoverflow.com/questions/32364055/formattting-phone-number-in-swift
Take care of the input number. 10 or 11 digits ?
Format may be:
(###) ###-#### : OK for US
or #-(###) ###-#### : if you want the internation code
or ## (#) # ####-#### : in countries as France even presented as 33 (0) 6 07 123456 where (0) is only for local call
If international, country code may be 1 digit (US), 2 digits (eg France 33) or 3 digits in many countries (Africa, Asia, …)
See for reference the telephone numbering plan :
h ttps://en.wikipedia.org/wiki/Telephone_numbering_plan
and
h ttps://en.wikipedia.org/wiki/List_of_country_calling_codes
It is pretty complex formatting to cover all the cases.
