title: How to delete Keychain data when app is uninstalled?
body: <p>I have a problem . I am saving some critical information on device Keychain for my App, but when I uninstall the App and install it again, these data is still saved. How can delete these information when the application is uninstalled? If this is not possible, how detect when the App is first Load after install it without save information in NSUserDefaults?</p>
  
  <p>Thank you very much.</p>