Tells the view controller that the extension is about to transition to a new presentation style.
- iOS 10.0+
The new presentation style. For a list of possible styles, see
App Presentation Style
Override this method to update your extension’s layout while the extension is transitioning between the
MSMessages styles. 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
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
presentation property is set to the