(Swift) Transition from Imap.FetchSingleHeader to Imap.FetchEmail

Provides instructions for replacing deprecated FetchSingleHeader method calls with FetchEmail.

Note: This example requires Chilkat v11.0.0 or greater.

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func chilkatTest() {
    let imap = CkoImap()!

    // ...
    // ...

    // ------------------------------------------------------------------------
    // The FetchSingleHeader method is deprecated:

    var emailObj: CkoEmail? = imap.fetchSingleHeader(1, bUid: false)
    if imap.lastMethodSuccess == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // ...
    // ...

    emailObj = nil

    // ------------------------------------------------------------------------
    // Do the equivalent using FetchEmail.
    // Your application creates a new, empty Email object which is passed 
    // in the last argument and filled upon success.

    var headerOnly: Bool = true

    let emailOut = CkoEmail()!
    var success: Bool = imap.fetchEmail(headerOnly, msgId: 1, bUid: false, email: emailOut)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }


}