# performSegue(withIdentifier:sender:) Performs the specified segue. ``` @MainActor optional func performSegue(withIdentifier identifier: NSStoryboardSegue.Identifier, sender: Any?) ``` ## Parameters `identifier` The string that uniquely identifies the segue in the storyboard file. In Interface Builder, you can provide an identifier string to a segue using the inspector. Pass this string to this parameter. > Note: > This method throws an [Exception handling](https://developer.apple.com/library/archive/documentation/General/Conceptual/DevPedia-CocoaCore/ExceptionHandling.html#//apple_ref/doc/uid/TP40008195-CH18) if there is no segue with the specified identifier or if the identifier is `nil`. `sender` The object that you want to use to initiate the segue. This parameter makes the object available to your implementation during the segue. ## Discussion Apps typically do not need to trigger segues programmatically. If needed, you can call this method to trigger a segue for an action that cannot be expressed in a storyboard file, such as a transition between scenes in different storyboards. Typically, a segue is triggered by a user action, such as clicking a button. In Interface Builder, configure an object, such as a control embedded in the view controller’s view hierarchy, to trigger the segue. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)