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# pageControllerDidEndLiveTransition(_:)

This message is sent when a transition animation completes.

```
@MainActor optional func pageControllerDidEndLiveTransition(_ pageController: NSPageController)
```

## Parameters

`pageController`

The page controller.

## Discussion

This message is sent when a transition animation completes either via swipe gesture or one of the page controller’s target-action navigation methods.

Your content view is still hidden and you must call the [`completeTransition()`](/documentation/AppKit/NSPageController/completeTransition()) method on `pageController` when your content is ready to show.

If completed successfully, a [`pageController(_:didTransitionTo:)`](/documentation/AppKit/NSPageControllerDelegate/pageController(_:didTransitionTo:)) will already have been sent.

---

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