Swift

Attach a File to an Email

Demonstrates the Chilkat Email.AddFileAttachment method, which attaches a file read from the filesystem. It returns the content type Chilkat assigned to the attachment (inferred from the file extension). This example attaches a PDF and prints its detected content type.

Background: Each attachment carries a Content-Type (MIME type) such as application/pdf or image/png that tells the receiving client how to handle it. Chilkat gets this from the file's extension. Because attachment bytes are binary, they are Base64-encoded for transport, which is handled automatically — you simply point AddFileAttachment at a path and the file is read, encoded, and packaged into the message.

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func chilkatTest() {
    //  Demonstrates the AddFileAttachment method, which attaches a file read from the
    //  filesystem.  It returns the content type Chilkat assigned to the attachment (based on
    //  the file extension), or returns failure if the file could not be read.

    let email = CkoEmail()!
    email.subject = "Email with a file attachment"
    email.body = "Please see the attached file."

    //  Attach a file.  The return value is the auto-detected content type.
    var contentType: String? = email.addFileAttachment(path: "qa_data/attachments/report.pdf")
    if email.lastMethodSuccess == false {
        print("\(email.lastErrorText!)")
        return
    }

    print("Attached content type = \(contentType!)")
    print("NumAttachments = \(email.numAttachments.intValue)")

    //  Note: The path "qa_data/attachments/report.pdf" is a relative local filesystem path,
    //  relative to the current working directory of the running application.

}