xcode - 为什么此联系人总是显示为 Nil/null，即使我设置了它或添加了电子邮件？

Question

在 iOS 6 中，此代码总是为第二个 NSLog 提供 Nil，但是第一个始终提供正确的复合名称。因此我知道我可以访问地址簿，如果我更改 addressbook 中的名称，代码会记录正确的复合名称。无论我输入多少封电子邮件，联系人 ABMultiValueGetCount 始终是 Nil。这是为什么？

ABRecordRef person = (__bridge ABRecordRef)[addressBookArray objectAtIndex:x];

NSLog(@"%@ -", ABRecordCopyCompositeName(person));
NSLog(@"%ld -", ABMultiValueGetCount(ABRecordCopyValue(person, kABPersonEmailProperty)));

Answer 1

明白了...看起来像是我应该预料到的某种 managedObjectContext 条件...

在一个 View Controller 中我这样做了:

ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL);
addressBookArray = (__bridge NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook);
// Prsented info on the user name, but not on the Emails
CFRelease(addressBook);

在第二个 View Controller 中，我传递了 addressBookArray 以尝试节省一些周期，然后执行此操作:

ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL);
// Successfully accessed name properties (suspect they were chached some where ?
// Unsuccsfully accessed email properties (they have never been accessed so no chache and I get Null
CFRelease(addressBook);

修复 ... 在第二个 View Controller 中重复:

addressBookArray = (__bridge NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook);

宾果问题解决了!!