Pushing a navigation controller after a modal view controller is presented

Question

I have a tab view controller which has a button like so and when it gets pressed a modal appears:

PostViewController *post = [[PostViewController alloc] init];

// [self.navigationController pushViewController:post animated:YES];

// Presentation
[self presentViewController:post animated:YES completion:nil];

When the modal is done I want to dismiss it and push a new view controller like so:

ProfilesViewController *profile = [[ProfilesViewController alloc] init];
[self.navigationController pushViewController:profile animated:YES];

But I can't do it in the post vc as its a modal. How do I do this?

Animatism

Why do you need to present something and dismiss it before even appearing? – Evzone

Answer 1

You can try using completionBlock.

CompletionBlock is called when presentViewController is done.

PostViewController *post = [[PostViewController alloc] init];
[con presentViewController:post animated:YES completion:^{
    ProfilesViewController *profile = [[ProfilesViewController alloc] init];
    [self.navigationController pushViewController:profile animated:YES];
}];

More information about presentViewController:animated:completion: Apple Doc

completion : The block to execute after the presentation finishes. This block has no return value and takes no parameters. You may specify nil for this parameter.

Algonquin

Okay so it pushes it behind the modal? – Animatism

It pushes into the navigationController stack. – Algonquin

If you want dismiss your modal before, you can add dismissViewControllerAnimated:completion: using the completionBlock too – Algonquin

One more question, once I dismiss post can the post data be displayed in the ProfilesViewController? So does the profile view controller run when it becomes visible? – Animatism

When you dismiss a ViewController, it releases all data inside. So you must provide all args you want to keep to the new VC. Hope this answer your question – Algonquin

Answer 2

Dose your tab view controller embedded in a UINavigationController? If you have not, you of course cannot use self.navigationController.

Lundell