title: Any way for webview to communicate with native iOS app?
body: <p>I have an iPad app that contains a webview. The webview's page has a button on it that, when clicked, needs to somehow tell the native app to close the webview. Is there any way to do this? i.e. a way for the javascript in the webview to pass messages to the native app, and vice-versa?</p>
  
  <p>Thanks!</p>