public protocol DeckSnapshotUpdater
A protocol to communicate to the transition that an update of the snapshot view is required. This is adopted only by the presentation controller of any view controller presented using DeckTransition
For various reasons (performance, the way iOS handles safe area, layout issues, etc.) this transition uses a snapshot view of your
presentingViewControllerand not the live view itself.
In some cases this snapshot might become outdated before the dismissal, and for those cases you can request to have the snapshot updated. While the transition only shows a small portion of the presenting view, in some cases that might become inconsistent enough to demand an update.
This is an expensive process and should only be used if necessary, for example if you are updating your entire app’s theme.