Navigation forward and back onPress event?

iOS emulator - 11.2

Version

Which versions are you using:

• react-native-swiper 1.5.13
• react-native https://github.com/expo/react-native/archive/sdk-25.0.0.tar.gz (latest)

Expected behaviour

I am currently using this for an onBoarding tour of an app. I use onIndexChanged to show/hide buttons for closing or skipping the swiper.

onIndexChanged={(index) => {
    this.setState({ showTourNav: index !== 3, showDoneButton: index === 3, showSkipButton: index === 0 });
}}

Actual behaviour

The problem with this approach is that the buttons don't show or hide until after the index changes. For example, on the first slide, I have skip button - you still see the skip button during the swipe animation before it disappears on the next slide. What I need is an event that fires immediately on the next and previous buttons in the nav, but I don't see anything in the docs.

How to reproduce it

Steps to reproduce

Start by reading the react-native-swiper navigation and onIndexChanged behavior described in the issue, then reproduce it with the listed react-native-swiper 1.5.13 and React Native SDK 25 versions on the iOS emulator. Trace when the next and previous navigation actions occur relative to the swipe animation. Done means an event is available at navigation-button press time so onboarding controls can update before the index changes.