Afnetworking post array - objective-c

Question

Im trying to post with an array as the post instead of a dictionary. However i get an error:
Incompatible pointer types sending NSMutableArray to parameter of type NSDictionary
Here is the code
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSMutableArray *parameters = #[#"foo", #"bar"];
[manager POST:#"http://example.com/resources.json" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
How can I post JUST the arrays contents?
Update:
This code works, but I would prefer to get the answer below working as its cleaner and af handles the serialization. Im guessing the request body is different, but how do i see what the body is?
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters
options:NSJSONWritingPrettyPrinted
error:&error];
NSString *body = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://example.com/resources.json"]
cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];
[request setHTTPMethod:#"POST"];
[request setValue: #"application/json" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody: [body dataUsingEncoding:NSUTF8StringEncoding]];
AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];
op.responseSerializer = [AFJSONResponseSerializer serializer];
[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON responseObject: %# ",responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", [error localizedDescription]);
}];
[op start];

Answer 1

I am assuming you want foo and bar to be your parameters without any values? if so you will want to do something like this
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSMutableArray *parameters = #[#"foo", #"bar"];
NSDictionary *params = [[NSDictionary alloc] initWithObjects:#[[NSNull null], [NSNull null]] forKeys:parameters];
[manager POST:#"http://example.com/resources.json" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
EDIT
Try adding
manager.requestSerializer = [AFJSONRequestSerializer serializer];
manager.responseSerializer = [AFJSONResponseSerializer serializer];