title: Can you use UIAppearance to set the titleview of UINavigationItem?
body: <p>I currently use this code to set the titleView of my navigation item:</p>
  
  <pre><code>- (void)viewDidLoad 
  { ...
     UIImage *navbarTitle = [UIImage imageNamed:@"navbartitleview1"];
     UIImageView *imageView = [[UIImageView alloc]initWithImage:navbarTitle];
     self.navigationItem.titleView =imageView;
  }
  </code></pre>
  
  <p>Is there a way I could put this code using UIAppearance? </p>
  
  <pre><code>[UINavigationItem appearance]
  </code></pre>
  
  <p>is not valid. </p>