CNContact is a thread-safe class for Apple architectures (MacOS, iOS, watchOS, etc.) that represent an immutable value object for contact properties, such as the first name and phone numbers of a contact.
The contact class (CNContact) is a thread-safe, immutable value object of contact properties, such as the contact’s name, image, or phone numbers. The contact class is like NSDictionary; it has a mutable subclass CNMutableContact you can use to modify contact properties. For contact properties that can have multiple values, such as phone numbers or email addresses, an array of CNLabeledValue objects is used. The labeled value class is a thread-safe, immutable tuple of labels and values. Labels describe each value to the user, allowing differentiation such as home and work phone numbers. The Contacts framework provides some predefined labels and you can create your own custom labels.
