title: How to change UIAlertView Backgroung color or background image in ios7?
body: <p>I want to customize the <code>UIAlertView</code> background color in iOS7.
  can any one give the correct solution for this?
   the followings are my code.</p>
  
  <pre><code>void UIAlertViewQuick(NSString* title, NSString* message, NSString* dismissButtonTitle) {
      UIAlertView* alert = [[UIAlertView alloc] initWithTitle:title
                                                      message:message
                                                     delegate:nil 
                                            cancelButtonTitle:dismissButtonTitle
                                            otherButtonTitles:nil
                            ];
  
  
      [alert show];
  
  }
  </code></pre>