title: Can't type in UITextFiled when placed in UIActionSheet
body: <p>A button triggers a function that creates a UIActionSheet. Looks like this:</p>
  
  <pre><code>reportSheet = [[UIActionSheet alloc] 
                 initWithTitle:nil
                 delegate:self
                 cancelButtonTitle:nil 
                 destructiveButtonTitle:nil
                 otherButtonTitles:nil
                 ];
  
  [reportSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
  </code></pre>
  
  <p>When i add a UITextField to this ActionSheet, I cant type any thing in it. The keyboard appears but when I press the buttons nothing happens. The marker just stands in position 0 and blink. 
  This code looks like this:</p>
  
  <pre><code>newComment = [[UITextField alloc] initWithFrame:CGRectMake(10, 10, 300, 200)];
  newComment.backgroundColor = [UIColor redColor];
  newComment.delegate = self;
  [reportSheet addSubview:newComment];
  [newComment release];
  </code></pre>
  
  <p>If I add the TextField to self.view (instead of reportSheet above) it works fine and there's no problem to type in it. </p>
  
  <p>Any ideas what's wrong here?</p>