How can I use the contactProvider framework?

To use the ContactProvider framework, you can follow the guidelines and examples provided in the session "Meet the Contact Access Button" from WWDC 2024. Here are the key points:

1. Authorization Levels:

   • Not Determined: The authorization prompt will be presented when your app attempts to access the contact store.
   • Authorized: Your app can read or write contact data.
   • Denied: Your app cannot access contact data.
   • Limited: Your app can only access a subset of contacts.

2. Contact Access Button:

   • This button fits into your existing UI and can grant access to new contacts with a single tap.
   • It is particularly useful when your app has limited authorization.
   • When tapped, it retrieves the contacts using CNContactStore.

3. CNContactStore:

   • This is the primary way to access contact data.
   • It can fetch contacts and create new contact entries.
   • It automatically presents the authorization prompt when queried.

4. CNContactPickerViewController:

   • This view controller presents a system UI for picking one or more contacts.
   • It works regardless of the authorization level and provides a one-time snapshot of the selected contacts.

5. Fetching Contacts:

   • Use CNContactStore to fetch contacts by their identifiers.
   • Example: Create a CNContactFetchRequest and use CNContactStore's enumerateContacts method to collect the results.

For a detailed example and further explanation, you can refer to the session Meet the Contact Access Button (08:34).

Relevant Sessions

1. Meet the Contact Access Button
2. What’s new in privacy