Appearance/Disappearance of a scene?

How do we know when a scene is going to appear/disappear? In native iOS development it’s very common to do some extra work in viewWillAppear/viewDidAppear/viewWillDisappear/viewDidDisappear. Is it supported in this repo currently?

[grahammendick]

Don’t forget to remove your listeners, too

handleNavigation(oldState, state, data, _, stateContext) {
  const crumb = stateNavigator.stateContext.crumb;
  if (stateContext.crumb === crumb)
    // did Appear
  else
    // did Disappear
})
componentDidMount() {
  this.stateNavigator.onNavigate(this.handleNavigation);
}
componentWillUnmount() {
  this.stateNavigator.offNavigate(this.handleNavigation);
}

[grahammendick]

Hey @emerson233 . How’s it going?

I’ve just released navigation-react-native v6.15.0. It supports scene navigation lifecycle hooks. In your Map example, you can add hooks to scene B and show and hide the map when the user navigates to and from B

useNavigated(() => {
  // Show map
});
useUnloaded(() => {
  // Hide map
});