ios - 释放 ABAddressBookRef 时崩溃

Question

我有这个枚举地址簿联系人的代码 -

  +(void)enumerateAddressBookContacts:(void(^)(NSString *name, NSArray *phoneNumbers, NSArray *emailAddresses, NSData *imageData, NSString *recordId))enumerationBlock  failure:(void (^)( NSError *error))failure{

    [self requestAddressBookPermissionsWithCompletion:^{
    if (enumerationBlock)
    {
        CFErrorRef error = nil;
        ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);
        CFArrayRef addressBookPeople = ABAddressBookCopyArrayOfAllPeople (addressBook);
        NSArray* people = (__bridge NSArray*)addressBookPeople;

        if ([people count])
        {

            for (NSUInteger i = 0; i < [people count]; i++)
            {
                ABRecordRef person = (__bridge ABRecordRef)people[i];

                NSArray *phoneNumbers = [self phoneNumbersOfPerson:person];
                NSArray *emailAddresses = [self emailAddressesOfPerson:person];
                NSString *fullName = [self fullNameOfPerson:person];
                NSData *imageData = [self imageDataOfPerson:person];
                NSString *recordId = [NSString stringWithFormat:@"%d", ABRecordGetRecordID(person)];

                void (^block)(NSString*, NSArray *, NSArray *, NSData*, NSString*) = [enumerationBlock copy];
                block(fullName,phoneNumbers,emailAddresses,imageData,recordId);

            }
        }
        else
        {
            //No contacts in addressbook
            if (failure) {
                NSError *error = [NSError errorWithDomain:kAddressBook code:kAddressBookUploadFailReasonEmptyAddressBook userInfo:@{NSLocalizedDescriptionKey:kAddressBookUploadFailReason[kAddressBookUploadFailReasonEmptyAddressBook]}];
                failure(error);
            }
        }

          if (addressBookPeople)
         {
             CFRelease(addressBookPeople);
         }

         if (addressBook)
         {
             CFRelease (addressBook);
        }
    }

} failure:^(NSError *error) {
    if (failure) {
        failure(error);
    }   
}];
}

在方法结束时释放 ABAddressBookRef 对象时发生崩溃。

这是其中一种枚举方法的示例(它们的作用相同)-

+ (NSArray*)phoneNumbersOfPerson:(ABRecordRef)person
{
    ABMutableMultiValueRef phones = ABRecordCopyValue (person, kABPersonPhoneProperty);
    NSMutableArray *phoneNumbers = [NSMutableArray array];
    CFIndex phonesNumberCount = ABMultiValueGetCount (phones);
    if (phonesNumberCount > 0)
    {
        for (CFIndex index = 0; index < phonesNumberCount; index++)
        {
            CFStringRef phoneValue = ABMultiValueCopyValueAtIndex (phones, index);
            [phoneNumbers addObject:(__bridge_transfer NSString *)phoneValue];

            if (phoneValue)
            {
                CFRelease (phoneValue);
            }
        }
    }

    if (phones)
    {
        CFRelease (phones);
    }

    return phoneNumbers;
}

当我删除版本时，我不会崩溃，但我认为会有泄漏。知道原因是什么吗？

谢谢

Answer 1

很好地找到了问题，我相信它可以帮助其他用户 -

看起来(__bridge_transfer NSString *)已经减少了CFStringRef的保留计数，所以没有必要释放它。

看起来 __bridge 的情况并非如此