title: Add UIPickerView to a UIAlertController
body: <p>I'm trying to add a <code>UIPickerVivew</code> to a <code>UIAlertController</code>. I tried to do the following:</p>
  
  <pre><code>- (void)alertPickerView    
  {    
      UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Title" delegate:nil    
                                                      cancelButtonTitle:nil    
                                                 destructiveButtonTitle:nil
                                                          otherButtonTitles:nil, nil];
      actionSheet.delegate = self;
      UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 0, 320, 200)];
      pickerView.delegate = self;
      pickerView.showsSelectionIndicator = YES;
      [actionSheet addSubview:pickerView];
  }
  </code></pre>
  
  <p>When I called the method, the <code>pickerView</code> and <code>actionSheet</code> didn't come up.</p>
  
  <p>(I would rather a <code>UIAlertController</code>, but if that's not possible, I'll go with a <code>actionsheet</code>.)</p>