Enable CORS on JSON API Wordpress

Ok I finally figured out an easy way...

You just have to add:

     <? header("Access-Control-Allow-Origin: *"); ?>

On the file api.php, this file is located in wp-content/plugins/json-api/singletons/api.php

I hope it helps more people with the same problem!

I've used a few different WordPress API's - but for those of you using the 'official' WP-API, I had much trouble with this CORS --- and what I found was that between the .htaccess approach and a few others I stumbled upon... adding this to your theme functions.php worked best.

function add_cors_http_header(){
    header("Access-Control-Allow-Origin: *");
}
add_action('init','add_cors_http_header');

Be sure not to use any combinations of these ( .htaccess, header.php, api.php, functions.php ) as it will be angry at you.