PanResponder.create() API either loses state or has stale state

Description

PanResponder has a bunch of private state. This means it's not safe to re-create during a gesture: that state would be lost. This means that it's important to keep a ref to PanResponder which is what the docs seem to suggest.

However, holding a ref to it is bad because all the props and state captured by handlers will be stale. To fix this, you have to either update parts of that ref manually, or to recreate the PanResponder instance (which, as mentioned earlier, will reset its state — which seems bad).

I think this says that PanResponder.create API is not a good API for Hooks and need to be revisited. E.g. maybe it should be a Hook like usePanResponder(config) which takes care of updating the appropriate event handlers as needed — or maybe implemented with useRef inside. The important part is that the handlers should always be fresh (and capture fresh values), while the internal state of the gesture recognizer should never be destroyed.

React Native Version

any version

Output of npx react-native info

irrelevant

Steps to reproduce

irrelevant

Snack, screenshot, or link to a repository

irrelevant

Inizia da packages/react-native/Libraries/Interaction/PanResponder.js, in particolare dallo stato privato e dall’API PanResponder.create descritti nell’issue, e confrontali con il modello di utilizzo documentato di PanResponder. Determina come gli handler possano ricevere valori aggiornati senza distruggere lo stato del gesto; il lavoro è completato quando sono stati concordati una direzione per l’API e il comportamento corrispondente sia per la conservazione dello stato sia per l’aggiornamento degli handler.