---
title: "didTransition(to:)"
framework: messages
role: symbol
role_heading: Instance Method
path: "messages/msmessagesappviewcontroller/didtransition(to:)"
---

# didTransition(to:)

Tells the view controller that the extension has transitioned to a new presentation style.

## Declaration

```swift
func didTransition(to presentationStyle: MSMessagesAppPresentationStyle)
```

## Parameters

- `presentationStyle`: The new presentation style. For a list of possible styles, see doc://com.apple.messages/documentation/Messages/MSMessagesAppPresentationStyle.

## Discussion

Discussion Override this method to respond after the extension’s user interface has transitioned to a new presentation style. The user can switch between styles by tapping the collapse and expand buttons in the Messages app. You can also programmatically trigger a transition by calling requestPresentationStyle(_:). The system doesn’t call this method on a view controller that is presenting a live view in the transcript or input field—in other words, when the view controller’s presentationStyle property is set to the MSMessagesAppPresentationStyle.transcript value.

## See Also

### Working with Presentation Styles and Contexts

- [presentationStyle](messages/msmessagesappviewcontroller/presentationstyle.md)
- [requestPresentationStyle(_:)](messages/msmessagesappviewcontroller/requestpresentationstyle(_:).md)
- [willTransition(to:)](messages/msmessagesappviewcontroller/willtransition(to:).md)
- [MSMessagesAppPresentationStyle](messages/msmessagesapppresentationstyle.md)
- [presentationContext](messages/msmessagesappviewcontroller/presentationcontext.md)
- [MSMessagesAppPresentationContext](messages/msmessagesapppresentationcontext.md)