title: How to convert string in JSON to int Swift
body: <pre><code>self.event?["start"].string
  </code></pre>
  
  <p>The output is = Optional("1423269000000")</p>
  
  <p>I want to get 1423269000000 as an Int</p>
  
  <p>How can we achieve this? I have tried many ways such NSString (but it changed the value)</p>