Adding a contact to the user’s address book on Apple platforms using the prescribed method requires jumping through a lot of hoops. You have to:
add NSContactsUsageDescription to your info.plist
add an entitlement to your app
ask the user for authorization (requires an in-app popup)
if you want to modify the note field of the contact, you need to get permission from Apple using an online form to...
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Copyright
Based on tdSimple originally by Lasantha Bandara and released under the CC By 3.0.