title: how to push view controller from a UIView's subclass
body: <p>I created a view "<code>CategoryTableView</code>" that subclass from <code>UIView</code>. And <code>CategoryTableView</code> contains a <code>UITableView</code>. I added <code>CategoryTableView</code> as a subview to <code>HomeViewController</code> that subclass from <code>UIViewController</code>. Right now, I want to push a new view controller when <code>didSelectRowAtIndexPath</code> executes. But, in  <code>CategoryTableView</code>, how do I push or present another view controller. I can't get to the navigation controller in <code>CategoryTableView</code>.</p>