模态视图中的导航控制器

Question

Currently, when a button is tapped, a UIModalPresentationSheet comes up. I'd like to add a navigation bar at the top of this when it slides up. I've tried a lot of things but nothing seems to work. Here's what i'm currently trying and it returns this error.

    AthleteAdd *addAthlete = [self.storyboard instantiateViewControllerWithIdentifier:@"addAthlete"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addAthlete];
    //[self.navigationController pushViewController:addAthlete animated:YES];

    addAthlete.delegate = self;
    addAthlete.modalPresentationStyle = UIModalPresentationFormSheet;
  //  UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:addAthlete];
    [self presentViewController:navigationController animated:YES completion:nil];

But it pushes it up modally, and without the modalpresentationsheet form. How can I make it so the navigation controller is sized correctly?

Answer 1

Try to change your code like this :

    AthleteAdd *addAthlete = [self.storyboard instantiateViewControllerWithIdentifier:@"addAthlete"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addAthlete];

    addAthlete.delegate = self;
    navigationController.modalPresentationStyle = UIModalPresentationFormSheet;


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

Because here, you try to present addAthlete from itself. So you get this error.

Answer 2

您应该展示您在其中包含addAthlete的navigationController。

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

Answer 3

You are presenting from current viewcontroller itself.

Try something like,

[self dismissViewControllerAnimated:YES completion:^{
   [self.parentViewController presentViewController: navigationController animated:YES completion:nil];
}];