title: Remove view when tapped outside
body: <p>I have a UIView, that I have appear when a button is tapped, I am using it as a custom alert view essentially. Now when the user taps outside the custom UIView that I added to the main view, I want to hide the cusomt view, I can easily do this with <code>customView.hidden = YES;</code> but how can I check for the tap outside the view?</p>
  
  <p>Thanks for the help</p>