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Last active Nov 27, 2015
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Uppercase all contacts family names
// A Twitter guy requested a way to update all his contacts family names to be uppercased
// So, I wanted to give a try to the all new iOS 9 Contacts framework
// I'm a Swift noob, I didn't even finish reading the Swift book (I'm at p. 302 :D)
import Contacts
let store = CNContactStore()
store.requestAccessForEntityType(.Contacts) { success, formerError in
if success
dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0)) {
let predicate = CNContact.predicateForContactsInContainerWithIdentifier(store.defaultContainerIdentifier())
let keysToFetch = [CNContactGivenNameKey, CNContactFamilyNameKey]
do {
let contacts = try store.unifiedContactsMatchingPredicate(predicate, keysToFetch: keysToFetch)
let saveRequest = CNSaveRequest()
for contact in contacts {
if (contact.isKeyAvailable(CNContactFamilyNameKey)) {
let updatedContact: CNMutableContact = contact.mutableCopy() as! CNMutableContact
updatedContact.familyName = contact.familyName.uppercaseString
try store.executeSaveRequest(saveRequest)
} catch _ {
print("An error occured.")
if let error = formerError {
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csfelipe commented Nov 5, 2015

Thanks, mate. Where you able to find a way to get all the contacts? With this one just a few came (which is better from all the posts I've seen in the past hour)

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McNight commented Nov 27, 2015

@fgringo: Sorry for taking so long to answer (I didn't receive any notification...), anyway...
It worked perfectly for me : I do get all the contacts if I put this snippet inside a simple application.
Maybe you have a very specific way to handle the contacts with your phone. Try looking at the CNContactStore and CNContainer documentation !

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