iOS解除之前的ViewController

Question

我将使用以下代码

呈现一个新的ViewController

UIStoryboard *storyboard = self.storyboard;
finishViewController *finished = [storyboard instantiateViewControllerWithIdentifier:@"finishViewController"];
[self presentViewController:finished animated:YES completion:nil];

当finishViewController上一个视图（上面的代码打开的视图）仍在后台处理时。有没有办法可以杀死它？