self.performSegue 找不到storyboard-segue-ID，即使它已被命名

Question

I am trying to programmatically segue in LiveController.swift . The relevant bit of code is here in LiveController.swift

self.performSegue(withIdentifier:"openWelcomePage" ,sender:self)

which throws error:

2020-04-16 20:51:44.614413-0400 alpha[53206:2805423] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Receiver (<alpha.LiveController: 0x101c248c0>) has no segue with identifier 'openWelcomePage''

This indicates the segue has not been named. But it has:

The over all storyboard is here:

Note the highlighted NavigationController is the source, it embeds Live which is attached to LiveController.swift . The target of the segue is the page with Log in and Sign up .

Note when I put a button into LiveController and drag a segue from the button to the Welcome view, and name it buttonSegue :

 self.performSegue(withIdentifier:"buttonSegue" ,sender:self)

displays the page modally as expected.

Answer 1

You need to have the segue from LiveController, not from Navigation Controller

Answer 2

This could be a few things so try these fixes:

1. Clean and build your project. Then, run again.
2. Quit Xcode, open up project and run.
3. In the Attribute Inspector , remove openWelcomePage and leave it blank.

Hope that either of these suggestions help.