title: Turning on WiFi Settings from UIAlertView
body: <p>In the Facebook app of iOS when the user open the app without turning on Wi-Fi, there is a UIAlertView pops up,</p>
  
  <pre><code>Location Accuracy
  
  Turning on Wi-Fi will improve location accuracy.
  
  Settings     Ok
  </code></pre>
  
  <p>How can I detect this Wi-Fi on/off in iOS &amp; also I want to redirect to the settings page of Wi-Fi settings to user to turn on Wi-Fi. I have seen lot of people told that it's not possible to do redirecting to settings page. But in this Facebook app it is possible. How can I do it in my app??</p>