ios - Error with RestKit POST Request -


i trying send json data in post request server using restkit getting error

expected content type {(     "application/x-www-form-urlencoded",     "application/json" )}, got text/plain

the code have written is: 

nsurl *url=[nsurl urlwithstring:[nsstring   stringwithformat:@"%@%@",base_service_url,task_service_url]]; rkobjectmapping *mapping=[rkobjectmapping mappingforclass:[logindata class]]; [mapping addattributemappingsfromdictionary:@{@"s":@"status",                                               @"message":@"message"}]; rkresponsedescriptor *descriptor=[rkresponsedescriptor responsedescriptorwithmapping:mapping method:rkrequestmethodpost pathpattern:nil keypath:@"" statuscodes:0]; nsmutableurlrequest *request=[[nsmutableurlrequest alloc]initwithurl:url]; [request sethttpmethod:@"post"]; [request addvalue:@"application/json" forhttpheaderfield:@"content-type"]; nsdictionary *dict=@{@"task":@"storeprofile",                      @"fdate":@"01.01.2013",                      @"tdate":@"19.08.2013",                      @"keyword":@"taxi && cab",                      @"alerthours":@"120",                      @"alertday":@"0",                      @"alerttimestart":@"12:00",                      @"alerttimeend":@"18:00",                      @"topic":@[                              @{@"tname":@"politics"},                              @{@"tname":@"economy"}                              ],                      @"publication":@[                              @{@"pname":@"vijay times online"},                              @{@"pname":@"leisure opportunities"}                              ]                      }; nserror *error=nil; nsdata *jsondata=[nsjsonserialization datawithjsonobject:dict options:kniloptions error:&error]; if (error) {     nslog(@"%@",error.localizeddescription);     return; } [request sethttpbody:jsondata]; operation=[[rkobjectrequestoperation alloc]initwithrequest:request responsedescriptors:@[descriptor]]; [operation setcompletionblockwithsuccess:^(rkobjectrequestoperation *operation, rkmappingresult *mappingresult) {     logindata *data=[mappingresult.dictionary objectforkey:@""];     nslog(@"%@",data.message); } failure:^(rkobjectrequestoperation *operation, nserror *error) {     nslog(@"error:%@",error.localizeddescription); }]; [operation start];

could please me figure out problem is?? have tried setting content type follow also:

[request addvalue:@"application/application/x-www-form-urlencoded; charset=utf-8" forhttpheaderfield:@"content-type"];

you have register class rknsjsonserialization . please include below code in method.

[rkmimetypeserialization registerclass:[rknsjsonserialization class] formimetype:@"text/plain"];

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