Updating User from Contacts

ContactsViewController.m

- (void)updateUserWithContactInfo {
    PFUser *currentUser = [PFUser currentUser];
    NSString *name = currentUser[nameKey];
    
    NSArray *people = (NSArray *)CFBridgingRelease(ABAddressBookCopyPeopleWithName(ABAddressBookCreateWithOptions(NULL, NULL), (__bridge CFStringRef)(name)));
    if (people != nil && people.count > 0) {
        ABRecordRef person = (__bridge ABRecordRef)[people objectAtIndex:0];
        NSData *photoData = CFBridgingRelease(ABPersonCopyImageDataWithFormat(person, kABPersonImageFormatThumbnail));
        NSString *firstName = CFBridgingRelease(ABRecordCopyValue(person, kABPersonFirstNameProperty));
        NSString *lastName = CFBridgingRelease(ABRecordCopyValue(person, kABPersonLastNameProperty));
        if (photoData != nil) {
            PFFile *photoFile = [PFFile fileWithData:photoData];
            currentUser[photoKey] = photoFile;
        }
        currentUser[firstNameKey] = firstName;
        currentUser[lastNameKey] = lastName;
    }
}