iOS Contacts Framework: How to fetch contacts by phone number - ios

Question

I have a custom User class which stores the phone number of the user.
class User {
let phoneNumber: String
}
How do I get the corresponding contact from the users contact book?
I tried the following but it seems like this works just for the contacts name because I'm always getting nil:
let predicate = CNContact.predicateForContactsMatchingName(userInstance.phoneNumber)
let keysToFetch = [CNContactFormatter.descriptorForRequiredKeysForStyle(.FullName), CNContactPhoneNumbersKey]
// Is already permitted
try! CNContactStore().unifiedContactsMatchingPredicate(predicate, keysToFetch: keysToFetch).first // This returns nil
I've searched in the docs but I didn't find a proper solution.

Answer 1

let contactStroe = CNContactStore()
let keysToFetch = [
CNContactFormatter.descriptorForRequiredKeysForStyle(.FullName),
CNContactEmailAddressesKey,
CNContactPhoneNumbersKey,
CNContactImageDataAvailableKey,
CNContactThumbnailImageDataKey]
contactStroe.requestAccessForEntityType(.Contacts, completionHandler: { (granted, error) -> Void in
if granted {
let predicate = CNContact.predicateForContactsInContainerWithIdentifier(contactStroe.defaultContainerIdentifier())
var contacts: [CNContact]! = []
do {
contacts = try contactStroe.unifiedContactsMatchingPredicate(predicate, keysToFetch: keysToFetch)// [CNContact]
}catch {
}
for contact in contacts {
var phoneStr = ""
var nameStr = ""
var number: CNPhoneNumber!
if contact.phoneNumbers.count > 0 {
number = contact.phoneNumbers[0].value as! CNPhoneNumber
phoneStr = number.stringValue.stringByReplacingOccurrencesOfString("-", withString: "")
}
nameStr = contact.familyName + contact.givenName
if !nameStr.isEmpty && !phoneStr.isEmpty {
let friend = YFriendsModel()
friend.name = nameStr
friend.phone = phoneStr
self.friendArr.append(friend)
}
}
})
this is my way, you can have a test

Answer 2

You can't.
This is a stupid solution as a huge workaround.
Read each contact
Normalize the phone number (not the easiest thing to do!)
Cache contacts into a [String : Contact]
Then you can lookup contacts with contacts[phone_number]?

Answer 3

Swift 3
A nice solution, taking care also of efficiency:
func getAllContacts() {
let status = CNContactStore.authorizationStatus(for: CNEntityType.contacts) as CNAuthorizationStatus
if status == CNAuthorizationStatus.denied {
self.showAccessContactsDeniedAlert()
return
}
let contactStore = CNContactStore()
let keysToFetch = [
CNContactFormatter.descriptorForRequiredKeys(for: .fullName),
CNContactEmailAddressesKey,
CNContactPhoneNumbersKey,
CNContactImageDataAvailableKey,
CNContactThumbnailImageDataKey] as [Any]
let request = CNContactFetchRequest(keysToFetch:keysToFetch as! [CNKeyDescriptor])
do {
try contactStore.enumerateContacts(with: request, usingBlock: { (contact:CNContact, stop:UnsafeMutablePointer<ObjCBool>) -> Void in
print(contact)
for email in contact.emailAddresses {
var dict = [String:String]()
dict["name"] = contact.familyName + contact.givenName
dict["email"] = email.value
self.allContacts.add(dict)
}
})
} catch {
//catch
}
}
In this case I save name and email into a dict and I add it to a class variable called allContacts.
Note that a contact can have more than one email, so I create a dict for any email address in this case