How can I fetch a contact by phone number

In the CNContactStore Class Reference, you can find this description:

- unifiedContactsMatchingPredicate:keysToFetch:error:

Use only the predicates from the

CNContact

And in the CNContact class reference, you can find only two predicate methods:

+ predicateForContactsMatchingName:

+ predicateForContactsWithIdentifiers:

(Other two predicate methods are for groups and containers.)

So, if you want to choose contacts by phone number, you need to retrieve all contacts and filter it programatically yourself.

You can use - enumerateContactsWithFetchRequest:error:usingBlock: to fetch all the contacts, but all the same,

Compound predicates are not supported. (in predicate of CNContactFetchRequest)

Actually, for since iOS 11 SDK CNContactStore provides a new pre-configured NSPredicate for exactly this:

+ (NSPredicate *)predicateForContactsMatchingPhoneNumber:(CNPhoneNumber *)phoneNumber;

https://developer.apple.com/documentation/contacts/cncontact/3020511-predicateforcontactsmatchingphon?language=objc