Objective-C use Contacts.framework 聯絡人資訊

Step1

Add Framework

#import <Contacts/Contacts.h>
#import <ContactsUI/ContactsUI.h>

Step2

Add Privacy

Privacy - Contacts Usage Description

Step3

Check Authorization Status

CNContactStore *contactStore = [[CNContactStore alloc] init];
​
if ([CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts] == CNAuthorizationStatusNotDetermined) {
  [contactStore requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
    if (!error){
      if (granted) {
        NSLog(@"authorized");
        [self fetchContactWithContactStore:contactStore];   
        dispatch_async(dispatch_get_main_queue(), ^{
          NSLog(@"contacts:%@", contacts);
        });
      } else {
        NSLog(@"denied");
      }
    } else {
      NSLog(@"error!");
    }
  }];
} else {
  [self fetchContactWithContactStore:contactStore];
  dispatch_async(dispatch_get_main_queue(), ^{
    NSLog(@"contacts:%@", contacts);
  });
}

Step4

code

- (NSMutableArray *)fetchContactWithContactStore:(CNContactStore *)contactStore {
    if ([CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts] == CNAuthorizationStatusAuthorized) {
        NSError *error = nil;
        NSArray <id<CNKeyDescriptor>> *keysToFetch = @[CNContactFamilyNameKey, CNContactGivenNameKey, CNContactPhoneNumbersKey];
        NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:contactStore.defaultContainerIdentifier];
        NSArray<CNContact*> *arr = [contactStore unifiedContactsMatchingPredicate:predicate keysToFetch:keysToFetch error:&error];
        
        if (!error) {
            NSMutableArray *contacts = [NSMutableArray array];
            for (int i = 0; i < arr.count; i++) {
                CNContact *contact = arr[i];
                NSString *givenName = contact.givenName;
                NSString *familyName = contact.familyName;
                NSString *phoneNumber = ((CNPhoneNumber *)(contact.phoneNumbers.lastObject.value)).stringValue;
                
                [contacts addObject:@{@"name":[givenName stringByAppendingString:familyName], @"phoneNumber":phoneNumber}];
            }
            return contacts;
        } else {
            return nil;
        }
    } else {
        NSLog(@"denied");
        return nil;
    }
}