Accessing Online Slim API from iphone & IOS application - ios

Question

I have simple API developed in Slim, which is stored in Online Server. It works fine when I check it from browser, but when I retrieve it from Iphone app, it show me the following error:
PeopleAlsoAsk[12607:2219389] Error Domain=AFNetworkingErrorDomain Code=-1011 "Expected status code in (200-299), got 500" UserInfo={NSLocalizedRecoverySuggestion="this is index pagpe, Specific questions are retrieved successfully", NSErrorFailingURLKey=http://upvc.pk/test2/public/, AFNetworkingOperationFailingURLRequestErrorKey=<NSMutableURLRequest: 0x608000001060> { URL: http://upvc.pk/test2/public/ }, AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0x60800003d6c0> { URL: http://upvc.pk/test2/public/ } { status code: 500, headers {
"Accept-Ranges" = bytes;
Connection = "Keep-Alive";
"Content-Encoding" = gzip;
"Content-Length" = 81;
Date = "Wed, 26 Apr 2017 12:34:31 GMT";
Server = LiteSpeed;
Vary = "Accept-Encoding";
"X-Powered-By" = "PHP/7.0.17";
} }, NSLocalizedDescription=Expected status code in (200-299), got 500}
2017-04-26 17:34:31.462 PeopleAlsoAsk[12607:2219389] Error function called
I tried a lot, but all in vain. If any one faced this problem, or know about this, then please guide me in this. Thanks in advance.
My code is given below
public/index.php
<?php
use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;
require '../vendor/autoload.php';
$app = new \Slim\App;
//Questions Routes
require '../src/routes/questions.php';
$app->run();
routes/questions.php
<?php
use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;
$app = new \Slim\App;
//Get All Questions
$app->get('/api/questions', function(Request $request, Response $response){
$questions = "All questions are retrieved successfully";
echo json_encode($questions);
});
// Get specific Questions
$app->get('/api/questions/{app_id}', function(Request $request, Response $response){
$questions = "Specific questions are retrieved successfully";
echo json_encode($questions);
});

Answer 1

You should put your iOS code here.
From your Slim, I would place:
$app->status($status_code);
In your response code, you can add this function to give all client response:
function echoResponse($status_code, $response) {
$app = \Slim\Slim::getInstance();
// Http response code
$app->status($status_code);
// setting response content type to json
$app->contentType('application/json');
echo json_encode($response);
}
Usage very simple:
echoResponse(200, "your response");
From iOS point of view, hard to say something without the code.