Question

我正在尝试访问iPad的地址簿电子邮件。

代码的一部分是：

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);
      .
      .
      .
      .

崩溃只能在客户端iPad-Mini上重现。我们试图重现崩溃，但它没有发生。

在分析调试版本之后，我们知道崩溃发生在Line＆＃34; ABMultiValueRef电子邮件= ABRecordCopyValue（ref，kABPersonEmailProperty）;＆＃34;。事故并非每次都发生。它发生在2-3次尝试访问地址簿电子邮件。仅限客户使用。

我的疑问是＆＃34; ABRecordRef ref = CFArrayGetValueAtIndex（arrayRef，i）;＆＃34;可能是零或空。但在什么情况下，这可能是零或空？

任何人都可以帮助我知道崩溃的原因。

Answer 1

原因可能是ABAddressBookGetPersonCount返回地址簿中所有人的数量，而ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering只返回1个来源的所有人，而且他们的数量可能不同。另外，我建议您检查下面的错误。当然你还有CFRelease任何返回的CF对象。

    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
    }

应用程序在ABMultiValueRef崩溃

1 个答案: