错误域= NSURLErrorDomain代码= -1017“无法解析响应”

我发布json时收到错误。

Here I am getting error while I post json.

错误域= NSURLErrorDomain Code = -1017无法解析响应UserInfo = 0x7f89dac01a40 {NSUnderlyingError = 0x7f89e0277a20无法解析响应，NSErrorFailingURLStringKey = http：//test-onboard.qlc。 in / FieldSense / authenticate ，NSErrorFailingURLKey = http://test-onboard.qlc.in / FieldSense / authenticate ，_ kCFStreamErrorDomainKey = 4，_kCFStreamErrorCodeKey = -1，NSLocalizedDescription =无法解析响应}

Error Domain=NSURLErrorDomain Code=-1017 "cannot parse response" UserInfo=0x7f89dac01a40 {NSUnderlyingError=0x7f89e0277a20 "cannot parse response", NSErrorFailingURLStringKey=http://test-onboard.qlc.in/FieldSense/authenticate, NSErrorFailingURLKey=http://test-onboard.qlc.in/FieldSense/authenticate, _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-1, NSLocalizedDescription=cannot parse response}

这是我的代码：

NSDictionary *dictionaryData=[[NSDictionary alloc]initWithObjectsAndKeys:self.txtUsername.text, @"userEmailAddress", self.txtPassword.text, @"password",nil];            
NSData* jsonData = [NSJSONSerialization dataWithJSONObject:dictionaryData options:kNilOptions error:&error];

[request setURL:url];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:jsonData];