AFJSONRequestSerializer POST JSON Array - objective-c

Question

I am trying to post to an API that is expecting a JSON array as input, for example:
[
{
"token": "bd3",
"display_order": 0
}
]
I am unable to get AFJSONRequestSerializer to produce this, my code to create the params :
NSDictionary *campParams = #{#"token" : #"bd3", #"display_order" : #"0" };
NSArray *arr = [NSArray arrayWithObject:campParams];
NSDictionary *final = [NSDictionary dictionaryWithObject:arr forKey:#""];
Which creates the JSON as:
{"":[{"token":"bd55","display_order":"0"}]}
How can I modify my code to get the proper JSON output? I am creating a second dictionary as the AFHTTPRequestOperationManager accepts parameters as a dictionary, not an array.
[manager PUT:url parameters:final success:^(AFHTTPRequestOperation *operation, id responseObject) {
//done
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];

Answer 1

Don't add the last dictionary operation, the questions shows that a JSON array is expected..
NSArray * jsonArray = #[ #{ #"token" : #"bd3", #"display_order" : #"0" } ];
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonArray options:0 error:&error];
NSLog(#"jsonData as String: %#", [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]);
Output:
jsonData as String: [{"token":"bd3","display_order":"0"}]
There is a possibility that the last argument should be a number, not a string:
NSArray * jsonArray = #[ #{ #"token" : #"bd3", #"display_order" : #0 } ];
producing:
jsonData as String: [{"token":"bd3","display_order":0}]
which better matches your initial JSON example.
Here is an example but not using AFNetworking because I am not conversant in it:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPBody:jsonData];
[request setHTTPMethod:#"POST"];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue currentQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (connectionError) {
NSLog(#"Error: %#", connectionError);
}
else {
NSLog(#"data as String: %#", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
}
}];
Note: By all means use AFNetworking, it is great! I just know the older OSX/iOS methods by heart and I did not have a test project that already had AFNetworking installed.

Answer 2

My solution was to simply change the request serializer, I was not aware that it was not using JSON by default, so I changed it and now it works.