How add Int value to the Alamofire upload parameters

The NSKeyedArchiver is very curious. Usually you'd just send string representation, e.g.:

Alamofire.upload(.POST, URL, headers: headers, multipartFormData: { multipartFormData in    //add some jpg image    //add other values:    for (key, value) in parameters {        if value is String {            multipartFormData.appendBodyPart(data: value.dataUsingEncoding(NSUTF8StringEncoding)!, name: key)        } else if value is Int {            multipartFormData.appendBodyPart(data: "\(value)".dataUsingEncoding(NSUTF8StringEncoding)!, name: key)        }    }}, encodingCompletion: { encodingResult in    //some processing})

Or, even simpler, because string interpolation works with both String and Int:

Alamofire.upload(.POST, URL, headers: headers, multipartFormData: { multipartFormData in    //add some jpg image    //add other values:    for (key, value) in parameters {        if value is String || value is Int {            multipartFormData.appendBodyPart(data: "\(value)".dataUsingEncoding(NSUTF8StringEncoding)!, name: key)        }    }}, encodingCompletion: { encodingResult in    //some processing})

Or, in Alamofire 4 with Swift 3:

Alamofire.upload(multipartFormData: { multipartFormData in    //add some jpg image    //add other values:    for (key, value) in parameters {        if value is String || value is Int {            multipartFormData.append("\(value)".data(using: .utf8)!, withName: key)        }    }}, to: url, method: .post, headers: headers, encodingCompletion: { encodingResult in    //some processing})