CODEWITHSUNDEEP
swiftcontrollernavigationsegue
Wayne Henderson
Wayne Henderson

Reputation: 267

How to segue across iOS Navigation Controller programmatically using Swift?

My question is very much like these two:

EXCEPT that my segue is to a Navigation Controller, like this: Main->NC->VC2>VC3.

The segue from Main to VC2 works fine when I trigger it with a button in my first view controller. It does not work when the segue is called by code. I need to have the segue triggered automatically in response to certain conditions determined by the code in Main.

When the button is linked to a function coded in Main, it still works. Code in the button function definition runs and the segue occurs. When I try to trigger the segue in the code for the function, using

performSegueWithIdentifier("showHelp", sender: nil)

or

performSegueWithIdentifier("showHelp", sender: self)

I get an error:

Warning: Attempt to present <UINavigationController: 0x7fc8e1043000> on <myApp.Main: 0x7fc8e0d17b10> whose view is not in the window hierarchy!

The button continues to trigger the segue, despite the warning, but not when the button's function is called by other code.

Upvotes: 2

Views: 2047

Answers (1)

Sam
Sam

Reputation: 145

self.navigationController?.pushViewController(nextViewController, animated: true)

Upvotes: 3

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