IBM Watson Tone Analyzer API with Swift

Question

我正在使用Swift使用IBM Watson Tone Analyzer API。我尝试了以下代码：

override func viewDidLoad()
    {
        print("hello")
        super.viewDidLoad()
        let username = "USERNAME"
        let password = "PASSWORD"
        let versionDate = "2016-05-19" // use today's date for the most recent version
        let service = ToneAnalyzer(username: username, password: password, version: versionDate)

        let failure = { (error: NSError) in print(error) }
        service.getTone("Text that you want to get the tone of", failure: failure) { responseTone in
            print(responseTone.documentTone)
        }

    }

为此，我得到了以下错误: Error =-6004“数据无法序列化。无法解析Domain=com.alamofire.error响应。序列化过程中未提供错误信息。”UserInfo={NSLocalizedFailureReason=Data无法序列化。无法解析JSON响应。序列化过程中未提供错误信息。}

我读了文档，但它对解决这个问题没有帮助。

Answer 1

你似乎在使用某种库？如果是这样，最可能的原因是版本号已更改，您需要对其进行设置。More details about that here。

以下是我做的一些成功的示例代码(请原谅，我的Swift知识非常基础)。

//: Playground - noun: a place where people can play

import UIKit
var username = "<SERVICE USERNAME HERE>"
var password = "<SERVICE PASSWORD HERE>"
var endpoint = "https://gateway.watsonplatform.net/tone-analyzer/api/v3/tone?version=2016-05-19&text="

var sampleText = "I am really excited to be working with Watson!"

// -------------------------------------------------------------------

var authString = username + ":" + password
var authData = authString.dataUsingEncoding(NSASCIIStringEncoding)
var authValue = "Basic " + authData!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))

var toneUrl = endpoint + sampleText.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())!
let url = NSURL(string: toneUrl)

let config = NSURLSessionConfiguration.defaultSessionConfiguration()
config.HTTPAdditionalHeaders = ["Authorization" : authValue]
let session = NSURLSession(configuration: config)

var taskIsRunning = true;
let task = session.dataTaskWithURL(url!) {
    (let data, let response, let error) in
    if let httpResponse = response as? NSHTTPURLResponse {
        do {
            let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments)

            // Work with JSON object.
        }
        catch {
            print("Problem serialising JSON object")
        }
    }
    taskIsRunning = false
}

task.resume()
while (taskIsRunning) {
    sleep(1)
}