title: How does performSelector:withObject:afterDelay: work?
body: <p>I have found that after calling <code>[self performSelector:@selector(method1:) withObject:self.tableView afterDelay:3];</code> that <code>self.tableView</code>'s <code>retainCount</code> changes? Why?</p>
  
  <p>Thank you very much!</p>