CODEWITHSUNDEEP
iosiphonestoryboardviewcontrollernavigationcontroller
Liam Shalon
Liam Shalon

Reputation: 442

Navigation Segue not Working properly iOS Swift

My segue is returning with an error (unwrapping an optional value) from this line > self.navigationController?....

In my code...

let nextScreen = self.storyboard!.instantiateViewControllerWithIdentifier("onboarding-what") as? ViewController
        self.navigationController?.pushViewController(nextScreen!, animated: true)

This above code is implemented in my onboarding-start view controller

This is my storyboard set up...enter image description here

the last view controller has the id of "onboarding-what".

I've read the documentation for the navigation controller but can't seem to find my problem. Does anyone have a solution?

Upvotes: 1

Views: 273

Answers (2)

Alex
Alex

Reputation: 616

You can use performSegueWithIdentifier rather than pushViewController if you connected them in storyboard

However did you fill "onboarding-what" in the storyboardId field? pls check this image

Also "onboarding-what" view controller should be instance of ViewController (There's not default class called "ViewController" only "UIViewController" or "NSViewController" for osX.)

Upvotes: 1

Andrey Chernukha
Andrey Chernukha

Reputation: 21808

Obviously nextScreen is nil. It is most likely that "onboarding-what" identifier is incorrect

Upvotes: 1

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