Swift Requires Chilkat v11.0.0+

Mark IMAP Email as Read/Unread (Seen/Unseen)

Demonstrates how to mark emails as read or unread. Swift

func chilkatTest() {
    var success: Bool = false

    //  This example assumes the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    let imap = CkoImap()!

    //  Connect to an IMAP server.
    //  Use TLS
    imap.ssl = true
    imap.port = 993
    success = imap.connect(hostname: "imap.example.com")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    //  Login
    success = imap.login(login: "myLogin", password: "myPassword")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    //  Select an IMAP mailbox
    success = imap.selectMailbox(mailbox: "Inbox")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    //  Set PeekMode so that downloaded messages are not
    //  automatically marked as seen.
    imap.peekMode = true

    //  The NumMessages property contains the number of messages 
    //  in the currently selected mailbox.
    var numMsgs: Int = imap.numMessages.intValue
    if numMsgs == 0 {
        return
    }

    let email = CkoEmail()!
    var i: Int
    for i = 1; i <= numMsgs; i++ {
        //  Download each email by sequence number (not UID)
        success = imap.fetchEmail(headerOnly: false, msgId: i, bUid: false, email: email)
        if success == false {
            print("\(imap.lastErrorText!)")
            return
        }

        //  If desired, mark the email as SEEN.  There are two
        //  ways to do it:

        //  1) Set the flag directly by using the sequence number
        //  Indicate that we are passing a sequence number and
        //  not a UID:
        var bIsUid: Bool = false
        //  Set the SEEN flag = 1 to mark the email as SEEN,
        //  or set it to 0 to mark it as not-seen.
        success = imap.setFlag(msgId: i, bUid: bIsUid, flagName: "SEEN", value: 1)
        if success == false {
            print("\(imap.lastErrorText!)")
            return
        }

        //  2) Alternatively, we can use the email object.
        //  When an email is downloaded from the IMAP server
        //  Chilkat will add a "ckx-imap-uid" header to the email.
        //  This makes it possible to know the UID associated with
        //  the email.  (This is not the sequence number, which may change
        //  from session to session, but the UID which does not change.
        //  The SetMailFlag method is identical to SetFlag, except
        //  it gets the UID from the ckx-imap-uid header.
        //  For example:
        success = imap.setMailFlag(email: email, flagName: "SEEN", value: 1)
        if success == false {
            print("\(imap.lastErrorText!)")
            return
        }

    }

    //  Disconnect from the IMAP server.
    success = imap.disconnect()

}