dismissViewController: not working

Question

I have a view controller called vc0 which is presented like this:

[self presentViewController: vc1 animated: YES completion: nil];

And in vc1 I

Answer 1

First View:

Firstly embed in navigation controller in first view. and use this code to navigate to another view

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle: nil]; 
FirstView *rvc = [storyboard instantiateViewControllerWithIdentifier:@"apps"];
[self.navigationController pushViewController:rvc animated:YES];

Second view:

Add this line in the method for dismiss view

- (IBAction)back{
    [self.navigationController popViewControllerAnimated:YES];
}