从CFStringRef保存NSString。弧

Question

我正在尝试保存firstName和lastname。 NSLog(firstName);从地址簿中输出正确的值，但_dossier.firstName为空。 图像正确保存。

ABAddressBookRef addressBook = ABAddressBookCreate();

for (TKAddressBook *ab in contacts) {
    NSNumber *personID = [NSNumber numberWithInt:ab.recordID];
    ABRecordID abRecordID = (ABRecordID)[personID intValue];
    ABRecordRef abPerson = ABAddressBookGetPersonWithRecordID(addressBook, abRecordID);

    NSString* firstName = nil;
    NSString* lastName = nil;


    // Check person image
    UIImage *personImage = nil;
    if (abPerson != nil && ABPersonHasImageData(abPerson)) {

        firstName = (__bridge NSString*)ABRecordCopyValue(abPerson,
                                                          kABPersonFirstNameProperty);
        NSLog(firstName);
        lastName = (__bridge NSString*)ABRecordCopyValue(abPerson,
                                                         kABPersonLastNameProperty);

        CFDataRef contactThumbnailData = ABPersonCopyImageDataWithFormat(abPerson, kABPersonImageFormatThumbnail);
        personImage = [UIImage imageWithData:(__bridge NSData*)contactThumbnailData];
        CFRelease(contactThumbnailData);
        [_document.managedObjectContext performBlock:^() {
            Dossier *dossier = [NSEntityDescription insertNewObjectForEntityForName:@"Dossier"
                                                             inManagedObjectContext:_document.managedObjectContext];

            _dossier.firstName = firstName;
            _dossier.lastName = lastName;

            dossier.photo = personImage;
        }];

    }
}

Answer 1

在performBlock内，您已将firstName和lastName分配给_dossier，而不是新创建的dossier对象。

Answer 2

在这一行：

firstName = (__bridge NSString*)ABRecordCopyValue(abPerson,
        NSLog(firstName);                                                              kABPersonFirstNameProperty);

您的NSLog会中断该声明。除非格式化不知何故搞砸了。