如何在ios objective c中将特定数据格式发布到rest wcf json服务

我需要发布以下类型的格式，并获取json数据

{
    "Authentication": {
      "Username": "testUser@123",
      "Password": "testPassword@123"
    },
    "RequestType": 4
  }

我使用以下代码发布到wcf web服务

    NSData *__jsonData = nil;
    NSString *__jsonString = nil;
    NSURL *url=[NSURL URLWithString:@"http://adservicetest.azurewebsites.net/order/"];


    dict = @{@"Authentication":@{@"Username":email.text,@"Password":password.text},@"FileID": [NSNumber numberWithInt:fileID],@"RequestType":[NSNumber numberWithInt:requestType]};

  if([NSJSONSerialization isValidJSONObject:dict])
    {
        __jsonData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:nil];
      __jsonString = [[NSString alloc]initWithData:__jsonData encoding:NSUTF8StringEncoding];
         NSLog(@"Error %@", __jsonString);
    }

    // Be sure to properly escape your url string.

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody: __jsonData];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:[NSString stringWithFormat:@"%d", [__jsonData length]] forHTTPHeaderField:@"Content-Length"];

    NSError *errorReturned = nil;
    NSURLResponse *theResponse =[[NSURLResponse alloc]init];
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&theResponse error:&errorReturned];

    if (errorReturned)
    {
        NSLog(@"Error %@", errorReturned);
    }
    else
    {
        NSString *responseString=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers|NSJSONReadingAllowFragments error:nil];
        NSLog(@"%@", responseString);
    }

但是我得到了null responseString值，并且我已经使用chrome高级rest客户端测试了此post方法的工作情况，请纠正我哪里做错了。我在过去2天内无法解决此问题。请帮帮我

谢谢

请检查下面的输出，并告诉我您的查询是否已解决。
请使用以下代码并注释您的代码，然后您可以将NSData转换为所需的数据格式。
NSString*responseString=[[NSString alloc]initWithBytes:[数据字节]长度：[数据长度]编码：NSUTF8StringEncoding]；
NSLog（@“strAddr=%@”，responseString）；
//NSString*responseString=[NSJSONSerialization JSONObjectWithData:数据选项：无错误：&errorReturned]；
//NSLog（@“%@”，响应预算）；
//NSLog（@“Error%@”，errorReturned）；
打印responseString的说明：
服务
正文{color:#000000；背景色：白色；字体系列：Verdana；左边距：0px；右边距：0px；}内容{35;左边距：30px；字体大小：70em；底部填充：2em；}A:链接{color:#336699；字体重量：粗体；文本装饰：下划线；}A:已访问{color:#6699cc；字体重量：粗体；文本装饰：下划线；}A:活动{颜色：#336699；字体大小：粗体；文本装饰：下划线；}。标题1{背景颜色：#003366；边框底部：#336699 6px实心；颜色：#FFFFFFFF；字体系列：Tahoma；字体大小：26px；字体大小：正常；边距：0em 0em 10px-20px；填充底部：8px；填充左侧：30px；填充顶部：16px；}预处理{字体大小：小；背景色：#e5e5cc；填充：5px；字体系列：Courier New；页边距顶端：0px；边框：1px#f0f0e0实心；空白：预换行；空白：-预换行；字换行：中断字；}表格{边框折叠：折叠；边框间距：0px；字体系列：Verdana；}表格th{右边框：2px白色实心；边框底部：2px白色实心；字体大小：粗体；背景色：#cecf9c；}表格td{右边框：2px白色实心；边框底部：2px白色实心；背景色：#e5e5cc；}
服务
未找到终结点。请参阅有关构造对服务的有效请求的详细信息

请更新您的NSURL，并让我知道更多查询：）

答复如下：

Jason Data = {"Authentication":{"Password":"testPassword@123","Username":"testUser@123"},"RequestType":4}
2015-01-21 14:40:09.166 TestProject[2036:529966] strAddr = {"Errors":[],"StatusCode":200,"StatusMessage":"Get Orders List processed successfully","Files":[{"FileID":28,"Borrower":{"FirstName":"Ram","LastName":"Varma","PhoneNumbers":{"HomePhone":"5122154434","WorkPhone":"5124848340"},"Email":"ram@vonexpy.com"},"CoBorrower":{"FirstName":"Nadeem","LastName":"Shaik","PhoneNumbers":{"HomePhone":"5122154434","WorkPhone":"04065474405"},"Email":"nadeem@vonexpy.com"},"LenderDetails":{"LenderName":"VonExpy","LenderAddress":{"Address1":"101 ","Address2":"meghna ","City":"hyd","State":"AP","Zip":"500033"}},"LoanDetails":{"LoanType":"Housing","LoanPurpose":"business","LoanNumber":"VonExpy"},"PropertyAddress":{"Address1":"hyd","Address2":"guntur","City":"jubilee ","State":"UP","Zip":"87957"},"PropertyEstimatedValue":"fhy76","Orders":[{"OrderID":28,"AppraiserID":"27","AppraiserName":"FirstCLose","ProductDetails":{"ProductType":"hudy","FHACaseNumber":"746tr65"},"DueDate":"43543","InspectionDate":"983482374","Fee":"034202","NotesList":[],"Status":4,"Documents":[],"Condition":"987hkkk","ApplicationId":1,"ApplicationOrderId":"88"}]}]}

---

谢谢，但问题没有解决。我需要获取json数据，我不知道为什么会显示此消息。您能提供帮助吗？您好，当您尝试在浏览器中复制粘贴此url时，将显示Http页面，我们将得到相同的页面响应。您能分享有关您请求的更多详细信息，以便我可以帮助您吗？您需要更多帮助，请告诉我如何过滤此url上面的json数据使用状态，如果状态为4，相关数据应显示在tableview上，如果状态为5，相关数据应显示在tableview上。如何实现这一点。您需要使用NSJSONSerialization，它将返回您响应的字典或数组，然后您可以检查状态键的值是多少，并进一步使用它她

NSURL *url=[NSURL URLWithString:@"http://adservicetest.azurewebsites.net/order/json/process"];

Jason Data = {"Authentication":{"Password":"testPassword@123","Username":"testUser@123"},"RequestType":4}
2015-01-21 14:40:09.166 TestProject[2036:529966] strAddr = {"Errors":[],"StatusCode":200,"StatusMessage":"Get Orders List processed successfully","Files":[{"FileID":28,"Borrower":{"FirstName":"Ram","LastName":"Varma","PhoneNumbers":{"HomePhone":"5122154434","WorkPhone":"5124848340"},"Email":"ram@vonexpy.com"},"CoBorrower":{"FirstName":"Nadeem","LastName":"Shaik","PhoneNumbers":{"HomePhone":"5122154434","WorkPhone":"04065474405"},"Email":"nadeem@vonexpy.com"},"LenderDetails":{"LenderName":"VonExpy","LenderAddress":{"Address1":"101 ","Address2":"meghna ","City":"hyd","State":"AP","Zip":"500033"}},"LoanDetails":{"LoanType":"Housing","LoanPurpose":"business","LoanNumber":"VonExpy"},"PropertyAddress":{"Address1":"hyd","Address2":"guntur","City":"jubilee ","State":"UP","Zip":"87957"},"PropertyEstimatedValue":"fhy76","Orders":[{"OrderID":28,"AppraiserID":"27","AppraiserName":"FirstCLose","ProductDetails":{"ProductType":"hudy","FHACaseNumber":"746tr65"},"DueDate":"43543","InspectionDate":"983482374","Fee":"034202","NotesList":[],"Status":4,"Documents":[],"Condition":"987hkkk","ApplicationId":1,"ApplicationOrderId":"88"}]}]}