Swift

Add a String Attachment with a Specified Charset

Demonstrates the Chilkat Email.AddStringAttachment2 method, which adds a text attachment directly from an in-memory string and encodes it using a specified charset. The first argument is the attachment filename placed in the MIME (it is not a path to an existing file), the second is the text content, and the third is the charset used to encode the string. This example attaches a UTF-8 encoded text file.

Background: This is the charset-aware version of AddStringAttachment. Because text must be converted to bytes before it travels in a MIME part, the charset determines how non-ASCII characters (accents, non-Latin scripts) are represented. utf-8 is the safe modern default that can encode any character; the third argument may also begin with bom- or no-bom- to control whether a byte-order mark is written.

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func chilkatTest() {
    //  Demonstrates the AddStringAttachment2 method, which adds a text attachment from an
    //  in-memory string and encodes it using a specified charset.  The first argument is the
    //  attachment filename (not a path to read), the second is the content, the third is the charset.

    let email = CkoEmail()!
    email.subject = "Email with a charset-encoded string attachment"
    email.body = "See the attached text file."

    //  Add a string attachment named "notes.txt", encoding the content as utf-8.
    email.addStringAttachment2(fileName: "notes.txt", str: "Some notes with accented text.", charset: "utf-8")

    print("NumAttachments = \(email.numAttachments.intValue)")

}