Question

我能够使用fetchMessagesByUIDOperationWithFolder:获取所有消息，但是，当某些消息未读时，message.flags都会返回0，大多数消息都被读取，而有些消息则被加星标。

MCOIMAPMessagesRequestKind requestKind = MCOIMAPMessagesRequestKindHeaders;
NSString *folder = @"INBOX";
MCOIndexSet *uids = [MCOIndexSet indexSetWithRange:MCORangeMake(1, UINT64_MAX)];

MCOIMAPFetchMessagesOperation *fetchOperation = [session fetchMessagesByUIDOperationWithFolder:folder requestKind:requestKind uids:uids];
[fetchOperation start:^(NSError * error, NSArray * fetchedMessages, MCOIndexSet * vanishedMessages)
{
    if ( ! error )  {
        for ( MCOIMAPMessage * message_ in fetchedMessages )  {
           // I only want UNREAD messages.
        }
    }
}

我尝试使用if ( message_.flags & MCOMessageFlagSeen )但仍然会将所有标记返回为 0 。

查看邮件 UNREAD 的正确方法是什么？

Answer 1

对于遇到相同问题的任何人，您还需要包含对标志的类型请求：MCOIMAPMessagesRequestKindFlags。

MCOIMAPMessagesRequestKind requestKind = MCOIMAPMessagesRequestKindHeaders|MCOIMAPMessagesRequestKindFlags;

然后，查找未读标志：

for ( MCOIMAPMessage * message_ in fetchedMessages )  {
    if ( message_.flags == 0 ) {
        // I have a suspicion that this is not the correct
        // way to do this, but it seems to work the way I need.
    }
}

Answer 2

您可以使用0或更好，如下所示，也是0，但谁知道他们是否决定稍后将其更改为其他内容：

if(message_.flags == MCOMessageFlagNone)

MailCore2，只获取UNREAD消息，或知道哪些消息是UNREAD

2 个答案: