Swift

Create a multipart/related MIME Entity

Demonstrates the Chilkat Mime.NewMultipartRelated method, which initializes the object as an empty multipart/related entity. It takes no arguments; the primary part and its related resources are then appended.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: multipart/related ties a primary part to the resources it references — most commonly an HTML body and the inline images it embeds via cid: references. Unlike a plain attachment, a related image is displayed within the message rather than listed separately. The HTML part comes first, followed by each referenced resource with a matching Content-ID.

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Swift


func chilkatTest() {
    var success: Bool = false

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

    let mime = CkoMime()!

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

    //  multipart/related groups a primary part with the resources it references, such as an HTML body
    //  and the inline images it displays.
    let htmlPart = CkoMime()!
    success = htmlPart.setBody(fromHtml: "<html><body><img src=\"cid:logo\"></body></html>")
    if success == false {
        print("\(htmlPart.lastErrorText!)")
        return
    }

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

    success = mime.appendPart(fromFile: "qa_data/logo.png")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

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

}