This is now possible using CloudKit and the CKDiscoverAllContactsOperation class. You only get the user’s contacts that also use the same app and have given an explicit permission, but for some use cases it’s a nice start.
Is it possible to find user’s contacts that also have Apple devices?
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17-06-2023 - |
Question
Given the iOS Address Book API, or possibly other App Store friendly APIs, is it possible to find the user’s contacts that also use iOS? The only heuristic I was able to come up with was finding all contacts that have a kABPersonPhoneIPhoneLabel
phone number – but that method has a lot of both false positives and negatives.
Solution
OTHER TIPS
your heurisitic might be ok but it relies on the USER correctly setting that attribute.
depending on the context it might be good enough / or not .. dont know.
there is no real way to detect which user really uses ios (no API)
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