get CNContacts from Contacts.framework (objective-c)

gistfile1.txt

#if __IPHONE_OS_VERSION_MAX_ALLOWED > 80000
    //ios 9+
    CNContactStore *store = [[CNContactStore alloc] init];
    [store requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
        if (granted == YES) {
            NSMutableArray *contacts = [NSMutableArray new];
            NSArray *keys = @[CNContactFamilyNameKey, CNContactGivenNameKey, CNContactPhoneNumbersKey, CNContactImageDataKey];
            NSString *containerId = store.defaultContainerIdentifier;
            NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:containerId];
            NSError *error;
            NSArray *cnContacts = [store unifiedContactsMatchingPredicate:predicate keysToFetch:keys error:&error];
            if (error) {
                NSLog(@"error fetching contacts %@", error);
            } else {
                for (CNContact *contact in cnContacts) {
                    for (CNLabeledValue *label in contact.phoneNumbers) {
                        if ([[label.value stringValue] length] == 0) {
                            continue;
                        }
                        Contact *newContact = [[Contact alloc] init];
                        newContact.phone = [label.value stringValue];
                        newContact.firstName = contact.givenName;
                        newContact.lastName = contact.familyName;
                        UIImage *image = [UIImage imageWithData:contact.imageData];
                        if (image == nil) {
                            image = [UIImage imageNamed:@"noImageContact"];
                        }
                        else {
                            image = [self resizeImage:image toWidth:25];
                        }
                        newContact.image = image;
                        [contacts addObject:newContact];
                    }
                }
            }
            
            [self showCNContactsView];
        }        
    }];
#else
    //ios 8-
    CFErrorRef error = NULL;
    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);
    ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) {
        
    });
#endif
    

#pragma mark - Image Resize

- (UIImage *)resizeImage:(UIImage *)image toWidth:(CGFloat)width
{
    CGSize newSize = CGSizeMake(width, width);
    CGFloat widthRatio = newSize.width/image.size.width;
    CGFloat heightRatio = newSize.height/image.size.height;
    
    if(widthRatio > heightRatio) {
        newSize = CGSizeMake(image.size.width*heightRatio,image.size.height*heightRatio);
    }
    else {
        newSize = CGSizeMake(image.size.width*widthRatio,image.size.height*widthRatio);
    }
    
    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return newImage;
}