如何将 Int 值添加到 Alamofire 上传参数

Question

我想Int值添加到multipartFormData：

Alamofire.upload(.POST,
                 url,
                 headers: headers,
                 multipartFormData: { multipartFormData in
                    //add some jpg image
                    //add other vaues:
                    for (key, value) in parameters {
                        if value is String {
                            multipartFormData.appendBodyPart(data: value.dataUsingEncoding(NSUTF8StringEncoding)!, name: key)
                        } else if value is Int {
                            let convertedValueNumber: NSNumber = NSNumber(int: value.intValue)
                            let data = NSKeyedArchiver.archivedDataWithRootObject(convertedValueNumber)
                            multipartFormData.appendBodyPart(data: data, name: key)
                        }
                    }
    }, encodingCompletion: { encodingResult in
      //some processing
})

但是服务器返回错误，我没有发送Int值。如何将Int值添加到参数中？

Answer 1

NSKeyedArchiver非常好奇。通常你只会发送字符串表示，例如：

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
})

或者，更简单，因为字符串插值适用于String和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
})

或者，在 Alamofire 4 和 Swift 3 中：

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
})