Question 68676 in IOS Swift Question posted in
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NavigationController becomes nil after present a modal – Ios swift

In my project, I’m using a modal to show a detail of a service with a button to confirm a navigation to this service. In all my screens, I have the following example code to navigate throug screens:

code #1

self.navigationController?.setViewControllers([servicesVC], animated: false)

or

code #2

self.navigationController?.pushViewController(servicesVC, animated: false)

and everything runs fine.

Then I present my CustomViewController as a modal using the following code:

self.navigationController?.present(serviceDetailVC, animated: true, completion: nil)

But if I try to navigate to another screen from my modal (serviceDetailVC) using the code #1 or #2, my navigationController becomes nil and I can do nothing.

What I’m doing wrong?

Tags:

2

Answers


  1. 0

    use

    self.present(serviceDetailVC, animated: true, completion: nil)

    instead of

    self.navigationController?.present(serviceDetailVC, animated: true, completion: nil)
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  2. 0

    You’re presenting modally ViewController that is not embedded in UINavigationController.

    Instead of:

    navigationController?.present(serviceDetailVC, animated: true)

    You should do something like this:

    let detailNC = UINavigationController(rootViewController: serviceDetailVC)
navigationController?.present(detailNC, animated: true)

    This way, you’ll be able to push/set other view controllers to your modal screen.

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