title: how to perform a segue
body: <p>I would like implement a button to show another view.  I have defined the destination ViewController in Storyboard &amp; created a segue (of type push) and gave it an identifier.</p>
  
  <p>In my root view controller</p>
  
  <p>some method ...</p>
  
  <pre><code>        UIButton *btn = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
          [btn addTarget:self action:@selector(showDetailView:) forControlEvents:UIControlEventTouchUpInside];
  </code></pre>
  
  <p>and</p>
  
  <pre><code>- (IBAction)showDetailView:(id)sender {
      [self performSegueWithIdentifier:@"ShowDetail" sender:sender];
  }
  </code></pre>
  
  <p>however it doesn't do anything.  I hear a Segue is an object. do I need to have a reference to it / synthesize it in my root view controller class?  Any tip would be appreciated.  Thank you.</p>