title: Controlling size / position of UINavigationItem titleView
body: <p>In my app, I have some custom titles (with lettering that isn't a font) stored in pngs that I want to put as the title of my navigation. I want the lettering in the titles all to be the same size for each different view controller, so in illustrator I've worked on making it all the same size and width (affording blank space to account for shorter strings). I do the following:</p>
  
  <pre><code>UIImageView *titleImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"SelectAnAlbumTitleLettering"]];
  titleImageView.contentMode = UIViewContentModeCenter;
  self.navigationItem.titleView = titleImageView;
  [titleImageView release];
  </code></pre>
  
  <p>And it seems the image is arbitrarily resized and positioned based on the elements included on each <code>navigationBar</code> (i.e. back button, right button etc.). </p>
  
  <p>I'm wondering, how can I gain control of <code>titleView</code> so I can make it implement the size and position that I want and so it isn't arbitrarily resized / repositioned. </p>