从 CFStringRef 保存 NSString。弧

Question

我正在努力拯救 firstName 和 lastname. NSLog(firstName); 从地址簿打印正确的值，但是 _dossier.firstName 是空的。图像保存正确。

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 - 的里面 performBlock 你已分配 firstName 和 lastName 到 _dossier 而不是新创建的 dossier 目的。

Answer 2

在这一行中：

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

你的 NSLog 打断陈述。除非格式不知何故搞得非常糟糕。