title: FIlter search results using NSPredicate
body: <p>I have below array structure that I'm using as a <strong>UITableview Datasource</strong>. </p>
  
  <p>Now I want to implement search bar and want to filter item_name using <strong>NSPredicate</strong>. Can any please guide me how should I filter <strong>NSDictionaries</strong> based on their item names?</p>
  
  <pre><code>- NSArray
    -NSdictionary
      -NSArray
        -NSdicationary
         {
           item_id = “1”
           item_name = “Pizza”
        }
       -NSdicationary
        {
          item_id = “2”
          item_name = “Burger”
       }
  </code></pre>