CNContactPickerViewController gets error (CNPropertyNotFetchedException) - Objective-C - objective-c

Question

I am calling the Contact Picker View like so:
- (void)openContacts {
CNContactPickerViewController *picker = [[CNContactPickerViewController alloc] init];
picker.delegate = self;
picker.displayedPropertyKeys = #[CNContactGivenNameKey];
[self presentViewController:picker animated:YES completion:nil];
}
And I am handling the selections with this delegate method:
- (void)contactPicker:(CNContactPickerViewController *)picker didSelectContacts:(NSArray<CNContact *> *)contacts {
for (CNContact *contact in contacts) {
NSLog(#"%#",contact);
NSString *phone;
NSString *mobilePhone;
for (CNLabeledValue *label in contact.phoneNumbers) {
if ([label.label isEqualToString:CNLabelPhoneNumberMobile] || [label.label isEqualToString:CNLabelPhoneNumberiPhone]) {
mobilePhone = [label.value stringValue];
} else if ([label.label isEqualToString:CNLabelPhoneNumberMain]) {
phone = [label.value stringValue];
}
}
}
}
The NSLog outputs the following for contact: <CNContact: 0x78e56e50: identifier=1861C9BD-143B-4E93-8475-F9079F5D6192, givenName=Kate, familyName=Bell, organizationName=Creative Consulting, phoneNumbers=(not fetched), emailAddresses=(not fetched), postalAddresses=(not fetched)>
This only occurs on simulator and iOS9 iPad. I don't get an error with my iOS10 iPhone.

Answer 1

You should first ask permission for this. Then you can show picker.
CNContactStore *store = [[CNContactStore alloc] init];
[store requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error)
{
CNContactPickerViewController *picker = [[CNContactPickerViewController alloc] init];
picker.delegate = self;
picker.displayedPropertyKeys = #[CNContactGivenNameKey];
[self presentViewController:picker animated:YES completion:nil];
}];
In this case you'll show picker always, without dependance on user's choice. So you should check property availability like that:
if ([CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts] == CNAuthorizationStatusAuthorized)
{
}