title: Use NSArray to specify otherButtonTitles?
body: <p>UIAlertSheet's constructor takes an otherButtonTitles parameter as a varg list. I'd like to specify the other button titles from an NSArray instead. Is this possible?</p>
  
  <p>i.e. I have to do this:</p>
  
  <pre><code>id alert = [[UIActionSheet alloc] initWithTitle: titleString
                                    delegate: self
                                    cancelButtonTitle: cancelString
                                    destructiveButtonTitle: nil
                                    otherButtonTitles: button1Title, button2Title, nil];
  </code></pre>
  
  <p>But since I'm generating the list of available buttons at runtime, I really want something like this:</p>
  
  <pre><code>id alert = [[UIActionSheet alloc] initWithTitle: titleString
                                         delegate: self
                                cancelButtonTitle: cancelString
                           destructiveButtonTitle: nil
                                otherButtonTitles: otherButtonTitles];
  </code></pre>
  
  <p>Right now, I'm thinking that I need to have a seperate call to <code>initWithTitle:</code> for 1 item, 2 items and 3 items. Like this:</p>
  
  <pre><code>if ( [titles count] == 1 ) {
       alert = [[UIActionSheet alloc] initWithTitle: titleString
                                           delegate: self
                                  cancelButtonTitle: cancelString
                             destructiveButtonTitle: nil
                                  otherButtonTitles: [titles objectAtIndex: 0], nil];
  } else if ( [titles count] == 2) {
       alert = [[UIActionSheet alloc] initWithTitle: titleString
                                           delegate: self
                                  cancelButtonTitle: cancelString
                             destructiveButtonTitle: nil
                                  otherButtonTitles: [titles objectAtIndex: 0], [titles objectAtIndex: 1],  nil];
  } else {
      // and so on
  }
  </code></pre>
  
  <p>That's a lot of duplicate code, but it might actually be reasonable since I have at most three buttons. How can I avoid this?</p>