I am trying to send a username and password from an iOS app using AFNetworking framework to a php script. The iOS app continues to receive status code 401 which I defined to be "not enough parameters". I have tried returning the "username" from the php script to the iOS app and receive .

Based on what I've been investigating so far, it seems as though:

1) The php script is not decoding the POST parameters properly

2) The iOS app is not sending the POST parameters properly

The following is the iOS function

- (IBAction)startLoginProcess:(id)sender
{

NSString *usernameField = usernameTextField.text;
NSString *passwordField = passwordTextField.text;

NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:usernameField,        @"username", passwordField, @"password", nil];

NSURL *url = [NSURL URLWithString:@"http://localhost/~alejandroe1790/edella_admin/"];

AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
[httpClient defaultValueForHeader:@"Accept"];

[httpClient setParameterEncoding:AFJSONParameterEncoding];

[httpClient postPath:@"login.php" parameters:parameters
             success:^(AFHTTPRequestOperation *operation, id response) {
                 NSLog(@"operation hasAcceptableStatusCode: %d", [operation.response statusCode]);
             }
             failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                 NSLog(@"Error with request");
                 NSLog(@"%@",[error localizedDescription]);
             }];

}

The following is the php script

function checkLogin()
{

    // Check for required parameters
    if (isset($_POST["username"]) && isset($_POST["password"]))
    {
        //Put parameters into local variables
        $username = $_POST["username"];
        $password = $_POST["password"];

        $stmt = $this->db->prepare("SELECT Password FROM Admin WHERE Username=?");
        $stmt->bind_param('s', $username);
        $stmt->execute();
        $stmt->bind_result($resultpassword);
        while ($stmt->fetch()) {
            break;
        }
        $stmt->close();

        // Username or password invalid
        if ($password == $resultpassword) {
            sendResponse(100, 'Login successful');
            return true;
        }
        else 
        {
            sendResponse(400, 'Invalid Username or Password');
            return false;
        }
    }
    sendResponse(401, 'Not enough parameters');
    return false;
}

I feel like I may be missing something. Any assistance would be great.