Swift

Get an Alternative Body into a BinData

Demonstrates the Chilkat Email.GetAlternativeBodyBd method, which copies the contents of the Nth alternative body into a BinData object. The first alternative body is at index 0, and it should only be called when NumAlternatives is greater than 0. This example builds a message with plain-text and HTML alternatives and copies the first into a BinData.

Background: This is the binary counterpart to GetAlternativeBody (which returns text). Reading an alternative into a BinData preserves the exact bytes — important when a body part uses a binary or unusual transfer encoding, or when you intend to hash it or write it out verbatim rather than decode it to a string.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the GetAlternativeBodyBd method, which copies the contents of the Nth
    //  alternative body into a BinData object.  The first alternative body is at index 0; call
    //  only when NumAlternatives is greater than 0.

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

    email.setTextBody(bodyText: "This is the plain-text alternative.", contentType: "text/plain")
    email.addHtmlAlternativeBody(body: "<html><body>This is the HTML alternative.</body></html>")

    //  Copy the first alternative body (index 0) into a BinData object.
    let bd = CkoBinData()!

    success = email.getAlternativeBodyBd(index: 0, binData: bd)
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    print("Alternative 0 size (bytes) = \(bd.numBytes.intValue)")

}