title: viewWillAppear, viewDidAppear not called with pushViewController
body: <pre><code>NewViewController_iPhone *newViewController = [[NewViewController_iPhone alloc] initWithNibName:@"NewViewController_iPhone" bundle:nil];
  
  
  [self.navigationController pushViewController:newViewController animated:YES];
  </code></pre>
  
  <p><code>viewWillAppear:</code> and <code>viewDidAppear:</code> are not called in <code>NewViewController_iPhone</code>. Why not?</p>