Swift

Create a multipart/alternative MIME Entity

Demonstrates the Chilkat Mime.NewMultipartAlternative method, which initializes the object as an empty multipart/alternative entity. It takes no arguments; the alternative representations are then appended.

Background: multipart/alternative holds several renderings of the same content and lets the client pick the best one it can display — the standard way to send an email as both plain text and HTML. Order matters: parts go from least to most preferred, so the plain-text version comes first and the HTML last, and a client shows the last one it understands.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Mime.NewMultipartAlternative method, which initializes the object as an empty
    //  multipart/alternative entity, clearing any existing content.  It takes no arguments.

    let mime = CkoMime()!

    success = mime.newMultipartAlternative()
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    //  multipart/alternative holds two representations of the SAME content; the client displays the
    //  last one it can render.  Add a plain-text part, then an HTML part.
    let textPart = CkoMime()!
    success = textPart.setBody(fromPlainText: "Hello (plain text version).")
    if success == false {
        print("\(textPart.lastErrorText!)")
        return
    }

    success = mime.appendPart(mime: textPart)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    let htmlPart = CkoMime()!
    success = htmlPart.setBody(fromHtml: "<html><body><b>Hello</b> (HTML version).</body></html>")
    if success == false {
        print("\(htmlPart.lastErrorText!)")
        return
    }

    success = mime.appendPart(mime: htmlPart)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    print("Number of alternatives: \(mime.numParts.intValue)")

}