应用程序在ABMultiValueRef上崩溃

Question

我正在尝试访问iPad的地址簿电子邮件。

守则的部分是：

ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(NULL, NULL);
ABRecordRef recordRef = ABAddressBookCopyDefaultSource(addressBookRef);
CFArrayRef arrayRef  = ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering(addressBookRef, recordRef, kABPersonSortByFirstName);

for(int i = 0;i<ABAddressBookGetPersonCount(addressBookRef);i++)
{
      ABRecordRef ref = CFArrayGetValueAtIndex(arrayRef, i);
      ABMultiValueRef emails = ABRecordCopyValue(ref, kABPersonEmailProperty);
      .
      .
      .
      .

这起事故只能在客户端iPad上才能重现。我们试图复制崩溃，但它没有发生。

在分析了调试构建之后，我们了解到在"ABMultiValueRef emails = ABRecordCopyValue(ref，kABPersonEmailProperty)“行中发生了崩溃。坠机并不是每次都会发生。它在2-3次尝试访问addressBook电子邮件时发生一次.只为客户。

我怀疑"ABRecordRef ref = CFArrayGetValueAtIndex(arrayRef，i)“可能为零，也可能为空。但在何种情况下，这可能是零或空？

谁能帮我知道坠机的原因。

Answer 1

原因可能是ABAddressBookGetPersonCount返回地址簿中所有人员的数量，而ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering只返回一个源的所有人员，并且他们的人数可能不同。另外，我建议您检查下面这样的错误。当然，您还必须对任何返回的CF对象进行CFRelease。

    CFErrorRef error = nil;
    ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(NULL, &error);
    if (addressBookRef != nil) {
        ABRecordRef recordRef = ABAddressBookCopyDefaultSource(addressBookRef);
        CFArrayRef arrayRef  = ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering(addressBookRef, recordRef, kABPersonSortByFirstName);
        const unsigned int nrAllPeopleInSource = (unsigned int)CFArrayGetCount (arrayRef);
        if (arrayRef != nil) {
//            for(int i = 0;i<ABAddressBookGetPersonCount(addressBookRef);i++)
            /*
             ABAddressBookGetPersonCount returns the number of all people in the address book, whereas
             ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering returns all people of only 1 source, and their number might be different.
             */
            for(int i = 0;i<nrAllPeopleInSource;i++)
            {
                ABRecordRef ref = CFArrayGetValueAtIndex(arrayRef, i);
                ABMultiValueRef emails = ABRecordCopyValue(ref, kABPersonEmailProperty);
                // ... further code
            }
        } else {
            // no person found
        }
    } else {
        // addressbook could not be opened, lookup error
    }