title: Search Realm objects with UITextField
body: <p>I have a list of Realm objects that i want to search for using a <code>UITextField</code>. I added the search feature on a <code>UITableViewController</code>, and now i want to search for these objects using a <code>UITextField</code> where the user enters few letters and then the objects start appearing under it. How can I do that ?</p>