How to make a POST request in iOS? - ios

Question

I am trying to figure out how to make use of AFNetworking 2.0. I am trying to POST a login with a username and password.
This is my current attempt but something is not working as it does not get sent.
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *parameters = #{#"loginName": #"password"};
[manager POST:#"http://xxxx.com/login" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
NSLog(#"Data saved");
MainViewController *mainView = [[MainViewController alloc] initWithNibName:#"MainViewController" bundle:nil];
mainView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController: mainView animated:YES completion:nil];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
NSString *error_msg = (NSString *) error;
[self alertStatus:error_msg :#"Sign in Failed!" :0];
}];
}
} #catch (NSException * e) {
NSLog(#"Exception: %#", e);
[self alertStatus:#"Sign in Failed." :#"Error!" :0];
}
However nothing is happening, just keep getting this printout:
2014-04-16 20:14:09.903 Slidedrawer[9279:60b] Error: Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x8e78bd0 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
The response will be in JSON. Anyone know what I need to edit in the code or how to fix it?
JSON: {
"_id" = 533cb1c453769a02008c2d55;
name = dddd;
picture = "/img/users/default.jpg";
}
How do I access the above returned JSON, trying to pick apart each returned property to a string or integer etc...

Answer 1

Try this:
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *params = #{#"userName": username, #"password": password};
manager.responseSerializer = [AFJSONResponseSerializer serializer]; // if response JSON format
[manager POST:#"http://asd.com/login.php" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"%#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"%#", error);
}];
For parsing the response use this the responseObject as NSDictionary:
NSString *userName = [responseObject objectForKey:#"userName"];
NSString *password = [responseObject objectForKey:#"password"];
Hope this helps.. :)

Answer 2

You may find Send Nested JSON using AFNetworking for the answer.
The error Error Domain=NSCocoaErrorDomain Code=3840 is received invalid JSON object from the server. It is probably caused by the server's improper handling your missing parameters . Your parameters dictionary has only one key object loginName.