title: Get all characters after the last '/' (slash) from url string
body: <p>How to get all characters after the last '/' (slash) from url string?</p>
  
  <p>I receive a json string from my URL scheme when making webview request for certain site. For example:</p>
  
  <blockquote>
    <p>app://ga/ecommerce/%7B%22product%22:%22playstation4%22...}]</p>
  </blockquote>
  
  <p>I would like to grab the substring after the <strong>last</strong> '/'(slash).</p>
  
  <p>How can I achieve it? May I know what is the format of Regex?</p>
  
  <p>Avoid to use </p>
  
  <pre><code>NSRange lastDotRange = [sURL rangeOfString:@"/" options:NSBackwardsSearch];
  </code></pre>
  
  <p>because I might have <strong>escaped '/'</strong> in my json.</p>
  
  <p>Thank you.</p>