尝试向现有地址簿联系人添加新电话号码时断言失败

Question

我已经获得以下代码，可以为已有电话号码的现有联系人添加额外的电话号码。然而，它在ABMultiValueAddValueAndLabel调用失败时看起来像内部地址簿断言：

  

断言失败：（（（ABCMultiValue *）multiValue） - ＆gt; flags.isMutable），   函数ABMultiValueAddValueAndLabel，file   /Library/Caches/com.apple.xbs/Sources/AddressBook/AddressBook-11112.5/ABMultiValue.c，   第110行。

CFErrorRef error = nil;
    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);
CFArrayRef people = ABAddressBookCopyPeopleWithName(addressBook, CFSTR("SOME NAME"));
    ABRecordRef person;
    if ((people != nil) && (CFArrayGetCount(people) > 0))
    {
        // add new phone numbers to existing contact
        person = CFArrayGetValueAtIndex(people, 0);
        ABMutableMultiValueRef phoneNumbers  = (__bridge ABMutableMultiValueRef)((__bridge NSMutableDictionary *)ABRecordCopyValue(person, kABPersonPhoneProperty));
        ABMultiValueAddValueAndLabel(phoneNumbers, (__bridge CFStringRef)@"2063333333", kABPersonPhoneMainLabel, NULL);
        ABRecordSetValue(person, kABPersonPhoneProperty, phoneNumbers, nil);
        ABAddressBookAddRecord(addressBook, person, nil);

但是，当调用ABMultiValueAddValueAndLabel时，创建新条目的代码非常相似：

person = ABPersonCreate();
ABRecordSetValue(person, kABPersonFirstNameProperty, @"SOME NAME", nil);
ABMutableMultiValueRef phoneNumbers  = ABMultiValueCreateMutable(kABMultiStringPropertyType);
ABMultiValueAddValueAndLabel(phoneNumbers, (__bridge CFStringRef)@"2061111111", kABPersonPhoneMainLabel, NULL);
ABMultiValueAddValueAndLabel(phoneNumbers, (__bridge CFStringRef)@"2062222222", kABPersonPhoneMainLabel, NULL);
ABRecordSetValue(person, kABPersonPhoneProperty, phoneNumbers, nil);
ABAddressBookAddRecord(addressBook, person, nil);

为什么ABMultiValueAddValueAndLabel在第二个代码片段中成功但在第一个代码片段中失败？