title: Annotation details after detail disclosure pressed?
body: <p>I have a MKMapView annotation object that has a right callout accessory detail disclosure button. When the button is pressed I am using addTarget:action:forControlEvent to call a selector method which creates a detail viewController and pushes it onto the view stack.</p>
  
  <p>My question is what is the best way to access the information on the annotation that initiated the callout detail controller. The detail disclosure button is set to call:</p>
  
  <pre><code>[button addTarget:self action:@selector(disclosurePressed:) forControlEvents:UIControlEventTouchUpInside];
  </code></pre>
  
  <p>Which looks like this:</p>
  
  <pre><code>- (void)disclosurePressed:(id)sender {
  }
  </code></pre>
  
  <p>I guess I could look for the parent annotation of the sender UIButton, can anyone give me any pointers to how this is best done.</p>