iOS How to make more slow animation for api presentviewcontroller and dissmissviewcontroller?
<p>I am using following code to slow animation.</p>

<pre><code>      vc.modalPresentationStyle = UIModalPresentationCustom;
      vc.modalTransitionStyle = UIModalTransitionStyleCoverVertical;

      [self presentViewController:vc animated:NO completion:nil];
</code></pre>

<p>for dismiss view used</p>

<pre><code> [self dismissViewControllerAnimated:NO completion:nil];
</code></pre>

<p>I need animation from Bottom to Top for presentviewcontroller and Top to bottom for dismissviewcontroller.   </p>

<p>But this animation also to fast.How to make it slow? </p>