Swift

Get a Related Item as Text

Demonstrates the Chilkat Email.GetRelatedString method, which returns the text of a related item (with CR line-endings), interpreting the item's bytes using the supplied charset. It is intended for text-based related items such as style sheets. The first argument is the zero-based related-item index and the second is the charset. This example reads an embedded CSS style sheet as text.

Background: Not every related item is a binary image — some are text, like a CSS style sheet embedded so the HTML renders consistently offline. For those, GetRelatedString decodes the bytes back to characters using the charset you specify (typically utf-8). For binary related items such as images, read the raw data via the BinData-based accessor instead. This variant normalizes line endings to bare CR; use GetRelatedStringCrLf when you need CRLF.

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func chilkatTest() {
    //  Demonstrates the GetRelatedString method, which returns the text of a related item (with
    //  CR line-endings), interpreting the bytes using the specified charset.  This is intended
    //  for text-based related items such as style sheets.  The index is zero-based.

    let email = CkoEmail()!
    email.subject = "GetRelatedString example"

    //  The HTML references a related style sheet by name (Content-Location).
    email.setHtmlBody(html: "<html><head><link rel=\"stylesheet\" href=\"styles.css\"/></head><body>Styled.</body></html>")

    //  Add the related style sheet (index 0).
    email.addRelatedString2(filenameInHtml: "styles.css", str: "body { color: navy; }", charset: "utf-8")

    //  Get the first related item (index 0) as text, interpreting the bytes as utf-8.
    var content: String? = email.getRelatedString(index: 0, charset: "utf-8")
    print("Related item 0 text: \(content!)")

}