performSegueWithIdentifier has no segue with identifier

Question

I encountered a crash while testing my app. The following image is my storyboard:

storyboard

I have the code in View Controller:

@IBAction func unwindToHomeScreen(segue:UIStoryboardSegue) {

}

The view of "Add new Item" have a "Cancel" button, I controlled-drag it to the "Exit" icon at the top and link to unwindToHomeScreen, it works fine.

The "Add new Item" has a class AddTableViewController and the code I wrote inside:

@IBAction func save() {
    // Execute the unwind segue and go back to the home screen
    performSegueWithIdentifier("unwindToHomeScreen", sender: self)
}

I controlled-drag the "Save" button to the func, but the app crash when I click the button

I can use dismissViewControllerAnimated(true, completion: nil) instead, but I just wonder why performSegueWithIdentifier can't work?

I read the code at dropbox.com/s/hpybgg9x67rtqng/foodpinstatictable.zip?dl=0 and try to make one and using performSegueWithIdentifier like this example for practicing, I didn't see the segue identifier at her, what is the difference?

Did you actually give your segue an identifier in the storyboard? The name of the function in the controller you're going back to is not an identifier. — rdelmar, Jan 11 '15 at 17:05
I solved the problem, when I control-drag the "Cancel" to the "Exit" icon and link to "unwindToHomeScreen", I will get the "Unwind segue to Scene Exit Placeholder" show on the Document outline under the "Add New Item Scene", and then I get it the Identitier as "unwindToHomeScreen" — Ian, Jan 12 '15 at 01:53

AstroCB · Accepted Answer · 2015-01-11T17:32:21.443

69

You haven't actually given that segue an identifier. unwindToHomeScreen is a function that you can call; what you're looking for is your segue identifier, which is set in Interface Builder like this:

Set an identifier

In this example, I have a button wired to the next view via Interface Builder like you describe ("Interface Builder") and a button that is wired to this IBAction in my view controller ("Programmatically"):

@IBAction func goToNextView(sender: UIButton!) {
    self.performSegueWithIdentifier:("go", sender: self)
}

In any case, what you're missing is the actual identifier, which can be set in the attributes of a segue created in Interface Builder.

edited Jan 11 '15 at 17:32

answered Jan 11 '15 at 17:06

AstroCB

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thanks for the detail answer, that help me to find out the problem – Ian Jan 12 '15 at 01:47
I assumed that `sender:` should be `sender`, which didn't work but `sender: self` did, so thanks for the example! – Duncan Lukkenaer Jul 17 '18 at 12:22

score 6 · Answer 2 · edited Jan 08 '20 at 07:45

6

Swift 4:

Sometimes we must clean the build folder and then try again.

Worked for me after ctrl-dragging the new segue and giving it a name, then using it programatically as:

performSegue(withIdentifier: "goToMyNewViewController" , sender: self)

edited Jan 08 '20 at 07:45

Jawad Ali

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answered Jul 17 '19 at 23:55

Kristian

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score 3 · Answer 3 · answered Feb 23 '16 at 11:52

3

I found that because I renamed my view controller, I needed to delete and recreate the segue.

answered Feb 23 '16 at 11:52

Phil Hudson

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Stéphane de Luca · Answer 4 · 2019-07-06T13:11:48.483

1

A possible issue with iOS 12 and earlier (iOS 13 seems not to suffer from the same issue) might come from the fact that performSegue(withIdentifier:,sender:) is called from the view controller viewdidLoad() callback.

You absolutely must invoke it from the viewDidAppear(_ animated: Bool) callback in order to avoid the question-mentioned crash.

That will certainly save hours of hair-puling…

edited Jul 06 '19 at 13:11

answered Jul 06 '19 at 13:06

Stéphane de Luca

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score 0 · Answer 5 · answered May 04 '19 at 10:42

0

in my case reorder the Embed in

Tab bar controller Navigation controller vc (contains button - tapping button initiates a "show, e.g. push" segue)

Too fix the title in the navigationBar

answered May 04 '19 at 10:42

Espacucho

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Waheed · Answer 6 · 2021-02-19T10:09:33.940

0

I had the same issue.

All I did was:

I selected the segue indicator in the storyboard.

Deleted it.

Then created a new segue with the same identifier. Boom, it works.

edited Feb 19 '21 at 10:09

answered Feb 10 '21 at 18:05

Waheed

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score 0 · Answer 7 · answered Oct 12 '21 at 18:43

I had it all wired up correctly. It was just that the viewController I was segueing from, was NOT instantiated from the storyboard. I had it instantiated pragmatically.

I initially had it written as:

let vc = DeviceVC()

Had to change it to:

let sb = UIStoryboard(name: "Main", bundle: Bundle(for: DeviceVC.self))
let vc = sb.instantiateViewController(identifier: "DeviceVC") as! DevieVC

score -1 · Answer 8 · answered Nov 16 '16 at 13:13

-1

for me --> click on the relation-arrow between view controllers and then select attribute inspector, there is identifier give name and select push class done...

answered Nov 16 '16 at 13:13

Sumit

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performSegueWithIdentifier has no segue with identifier

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