Swift

Set the Charset of an Attachment

Demonstrates the Chilkat Email.SetAttachmentCharset method, which sets the charset parameter of the Content-Type header field for the attachment at a given zero-based index. This example adds a text attachment and sets its charset to utf-8.

Background: For a text attachment, the charset parameter tells the receiving client which character encoding the bytes use, so accented or non-Latin text renders correctly. Setting it explicitly (typically utf-8) removes ambiguity when the attachment contains non-ASCII content — without it, a client may guess wrong and display garbled characters.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the SetAttachmentCharset method, which sets the charset parameter of the
    //  Content-Type header field for the attachment at the given zero-based index.

    let email = CkoEmail()!
    email.subject = "Set attachment charset"

    email.addStringAttachment(fileName: "notes.txt", str: "Some notes.")

    //  Set the charset of the first attachment (index 0) to utf-8.
    success = email.setAttachmentCharset(index: 0, charset: "utf-8")
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    //  The attachment's Content-Type now includes charset="utf-8".
    print("\(email.getMime()!)")

}