Ios 解码后JSON数据为零

伙计们，我收到了一个api调用的响应。它返回整个响应，我将其交给如下方法

completionHandler(response: response, error: nil)

然后通过做

print(response.description)

结果是我得到了标题、状态码等

URL:
removed

Status Code:
200

Headers:
Keep-Alive: timeout=5, max=99
Content-Length: 2423
Server: Apache/2.4.10 (Debian)
SessionID: removed
Content-Type: application/json
Date: Thu, 24 Sep 2015 12:50:14 GMT
Connection: Keep-Alive
Cache-Control: no-cache

Payload:
[{"id":148,"name":"Amsterdam","avatar":"removed","cover":"removed"}]

我最感兴趣的部分是这一部分

Payload:
[{"id":148,"name":"Amsterdam","avatar":"removed","cover":"removed"}]

不知何故，我无法提取json对象数组。谁能帮我弄到这个

编辑：添加了接收响应并将其传递的方法

func requestObj(url: Routes, params: Dictionary<String, String>?, completionHandler: (response: Response?, error: NSError?) -> ())
{
    self.requestConfig(completionHandler: { () -> () in
        if let req = NSMutableURLRequest(urlString: self.config!.api!.baseUrl! + "/v2" + url.rawValue) {
            do {
                req.addValue(String(self.config!.api!.token!), forHTTPHeaderField: "Token")
                req.addValue(String(self.sessionID), forHTTPHeaderField: "SessionID")
                let opt = HTTP(req)
                opt.start { response in
                    if let err = response.error {
                        print("error: \(err.localizedDescription)")
                        print("opt finished with error info: \(response.description)")
                        completionHandler(response: nil, error: nil)
                    }
                    completionHandler(response: response, error: nil)
                    //print("data is: \(response.data)") access the response of the data with response.data
                }
            }
        }
    }) // request a valid config before doing anything
}

试试这个：

NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData:response options:0 error:&error];

然后，您可以执行

[jsonDictionary objectForKey:@”“]

来检索值

这是目标C，但我确信它在Swift中必须类似。

对于，您可以通过以下方式获得响应主体：

response.data

---

您是否已经尝试过使用“SwiftyJson”，您可以将数据保存在一个JSON对象中，然后将数据作为字典进行访问我是如何处理数据的

import Alamofire
import SwiftyJSON
 func RequestImages()
{
    Alamofire.request(.GET, "https://api.500px.com/v1/photos",parameters:["consumer_key":"gRU4LletUCA9RiOQhaJBAt62UyRRYUE6vsIcC7fO"])
        .responseJSON { _,_,result in
            switch result {
            case .Success(let data):
                let json = JSON(data)
                debugPrint(data)
                self.Photos = self.ParseJSON(json)
                self.performSegueWithIdentifier("ToCollection", sender: self)
            case .Failure(_, let error):
                print("Request failed with error: \(error)")
            }       
    }
}

下面是一些代码，我使用一个名为Alamofire的库，在这里我检索JSON中的响应，然后如果找到数据，我将数据保存在SwiftyJSON库提供的JSON对象中

let json = JSON(data)

然后我有一个名为“Photos”的“Image”模式的集合，我通过如下解析JSON数据来填充这个集合

 func ParseJSON(json:JSON)->[Image]
{
    //Get Image_URL
    var pictures = [Image]()
    for result in json["photos"].arrayValue
    {
        pictures.append(Image(url: result["image_url"].stringValue, name: result["name"].stringValue, news: result["description"].stringValue))
    }   
    debugPrint(pictures)
    return pictures

}

我希望我的实现能帮助你的问候

试试这个：-

override func viewDidLoad() {
    super.viewDidLoad()

  get_data_from_url("http://yourURL")


 }


func get_data_from_url(url:String) {

    let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
    Id = label1.text //your request parameters 
    JId = label2.text //your request parameters 

    var post:NSString = "uid=\(Id)&jid=\(JId)"
    //NSLog("PostData: %@",post);

    var url:NSURL = NSURL(string: url)!

    var postData:NSData = post.dataUsingEncoding(NSASCIIStringEncoding)!

    var postLength:NSString = String( postData.length )

    var request:NSMutableURLRequest = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "POST"
    request.HTTPBody = postData
    request.setValue(postLength as String, forHTTPHeaderField: "Content-Length")
    request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
    request.setValue("*/*", forHTTPHeaderField: "Accept")


    var reponseError: NSError?
    var response: NSURLResponse?

    var urlData: NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&reponseError)


    if  urlData != nil && reponseError == nil {

        let res = response as! NSHTTPURLResponse!;

        //NSLog("Response code: %ld", res.statusCode);

        if (res.statusCode >= 200 && res.statusCode < 300) {

            var responseData:NSString  = NSString(data:urlData!, encoding:NSUTF8StringEncoding)!

            NSLog("Response ==> %@", responseData)

            if Id != nil {

            extract_json(urlData!)

            }



        } else {


            var alertView:UIAlertView = UIAlertView()
            alertView.title = "Sign in Failed!"
            alertView.message = "Connection Failed"
            alertView.delegate = self
            alertView.addButtonWithTitle("OK")
            alertView.show()

        }


    } else {


        var alertView:UIAlertView = UIAlertView()
        alertView.title = "Sign in Failed!"
        alertView.message = "Connection Failure"
        if let error = reponseError {
            alertView.message = (error.localizedDescription)
        }
        alertView.delegate = self
        alertView.addButtonWithTitle("OK")
        alertView.show()

    }

}

  func extract_json(data:NSData) { 

    var error: NSError?

    let jsonData:NSArray = NSJSONSerialization.JSONObjectWithData(urlData!, options:NSJSONReadingOptions.MutableContainers , error: &error) as! NSArray


    let Id_temp: AnyObject? = ((jsonData)[0] as! NSDictionary)["id"]
    let Name_temp: AnyObject? = ((jsonData)[0] as! NSDictionary)["name"]
}

---

响应的类型是什么？它不包含表示响应体的属性吗？您应该在响应数据变量中获取JSON数据。请粘贴更多的代码，以便问题变得更清楚。对于NSURLConnection，您可以在连接委托方法didReceiveData:.@EricD中获得响应数据。响应类型为response。属性是（我假设）“有效负载：”对吗？我不知道任何
响应
类型。是从图书馆来的吗？它是代码中其他地方的自定义类型吗？它来自哪里？啊，是的，对不起，我正在使用库为我处理http请求@埃里克。这基本上是一个http响应。我通过返回response.data尝试了这一点，但结果为零：/@Reshad您是否检查了
error
引用是否有值？@CraigOtis是的。我用新的Do{}Catch{}块进行了尝试，但没有输入错误。取而代之的是，它打印了Do的值，但它是nill。你可以打印你得到的标题吗？也尝试过这个。当我返回时，它返回NSData。然后我想将它作为JSON保存在一个领域对象（参见realm.io）中，而不是为SwiftHTTP创建的JSONJoy对象。这就是问题所在。您的问题是如何从响应对象获取数据。我相信我已经回答了这个问题。现在，如果您有一个新的请求，比如如何从数据中获取json对象，然后使用Realm保存它，这将是一个完全不同的问题怎么会。。当我将{let jsonResult=try NSJSONSerialization.JSONObjectWithData（响应，选项：NSJSONReadingOptions.MutableContainers）作为？NSDictionary print（jsonResult）}捕获let error作为NSError{print（error）}时，我得到了零？（即使没有使用领域或任何东西）我告诉过你使用
response.data
，但你仍然在使用
response
，这是你的错误。不，我更改了我的方法以返回response.data completionHandler（response:response.data，error:nil），它是NSData作为该方法的返回值。所以这部分的响应是NSData
override func viewDidLoad() {
    super.viewDidLoad()

  get_data_from_url("http://yourURL")


 }


func get_data_from_url(url:String) {

    let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
    Id = label1.text //your request parameters 
    JId = label2.text //your request parameters 

    var post:NSString = "uid=\(Id)&jid=\(JId)"
    //NSLog("PostData: %@",post);

    var url:NSURL = NSURL(string: url)!

    var postData:NSData = post.dataUsingEncoding(NSASCIIStringEncoding)!

    var postLength:NSString = String( postData.length )

    var request:NSMutableURLRequest = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "POST"
    request.HTTPBody = postData
    request.setValue(postLength as String, forHTTPHeaderField: "Content-Length")
    request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
    request.setValue("*/*", forHTTPHeaderField: "Accept")


    var reponseError: NSError?
    var response: NSURLResponse?

    var urlData: NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&reponseError)


    if  urlData != nil && reponseError == nil {

        let res = response as! NSHTTPURLResponse!;

        //NSLog("Response code: %ld", res.statusCode);

        if (res.statusCode >= 200 && res.statusCode < 300) {

            var responseData:NSString  = NSString(data:urlData!, encoding:NSUTF8StringEncoding)!

            NSLog("Response ==> %@", responseData)

            if Id != nil {

            extract_json(urlData!)

            }



        } else {


            var alertView:UIAlertView = UIAlertView()
            alertView.title = "Sign in Failed!"
            alertView.message = "Connection Failed"
            alertView.delegate = self
            alertView.addButtonWithTitle("OK")
            alertView.show()

        }


    } else {


        var alertView:UIAlertView = UIAlertView()
        alertView.title = "Sign in Failed!"
        alertView.message = "Connection Failure"
        if let error = reponseError {
            alertView.message = (error.localizedDescription)
        }
        alertView.delegate = self
        alertView.addButtonWithTitle("OK")
        alertView.show()

    }

}

  func extract_json(data:NSData) { 

    var error: NSError?

    let jsonData:NSArray = NSJSONSerialization.JSONObjectWithData(urlData!, options:NSJSONReadingOptions.MutableContainers , error: &error) as! NSArray


    let Id_temp: AnyObject? = ((jsonData)[0] as! NSDictionary)["id"]
    let Name_temp: AnyObject? = ((jsonData)[0] as! NSDictionary)["name"]
}

  request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
  request.setValue("*/*", forHTTPHeaderField: "Accept")