react-native-parallax-scroll-view

react-native-parallax-scroll-view

A ScrollView-like component that:

• Has a parallax header
• Has an optional sticky header
• Is composable with any component that expects a ScrollView (e.g. ListView or InfiniteScrollView)
• Can be nested within other views
• Works on iOS and Android

(Tested with react-native 0.16.0 on Android and iOS.

Installation

$ npm install react-native-parallax-scroll-view --save

Demo

iOS	Android

Basic Usage

import ParallaxScrollView from 'react-native-parallax-scroll-view';

// Inside of a component's render() method:
render() {
  return (
    <ParallaxScrollView
      backgroundColor="blue"
      contentBackgroundColor="pink"
      parallaxHeaderHeight={300}
      renderParallaxHeader={() => (
       <View style={{ height: 300, flex: 1, alignItems: 'center', justifyContent: 'center' }}>
          <Text>Hello World!</Text>
        </View>
      )}>
      <View style={{ height: 500 }}>
        <Text>Scroll me</Text>
      </View>
    </ParallaxScrollView>
  );
}

Examples

Please refer to the ListView example provided to see how ParallaxScrollView can be used in combination with ListView.

The Android ListView example shows how you can use PullToRefreshViewAndroid with ParallaxScrollView.

There are more examples in the examples folder.

Usage (API)

All of the properties of ScrollView are supported. Please refer to the ScrollView documentation for more detail.

The ParallaxScrollView component adds a few additional properties, as described below.

Property	Type	Required	Description
parallaxHeaderHeight	number	Yes	This is the height of parallax header.
renderBackground	func	No	This renders the background of the parallax header. Can be used to display cover images for example. (Defaults to an opaque background using backgroundColor)
backgroundSpeed	number	No	The speed factor that the background moves at relative to the foreground. Defaults to 5.
renderForeground	func	No	This renders the foreground header that moves at same speed as scroll content.
renderStickyHeader	func	No	This renders an optional sticky header that will stick to the top of view when parallax header scrolls up.
stickyHeaderHeight	number	If renderStickyHeader is used	If renderStickyHeader is set, then its height must be specified.
renderFixedHeader	func	No	This renders an optional fixed header that will always be visible and fixed to the top of the view (and sticky header). You must set its height and width appropriately.
renderScrollComponent	func	No	A function with input props and outputs a ScrollView-like component in which the content is rendered. This is useful if you want to provide your own scrollable component. (See: https://github.com/exponentjs/react-native-scrollable-mixin) (By default, returns a ScrollView with the given props)
contentBackgroundColor	string	No	This is the background color of the content. (Defaults to '#fff')
onChangeHeaderVisibility	func	No	A callback function that is invoked when the parallax header is hidden or shown (as the user is scrolling). Function is called with a boolean value to indicate whether header is visible or not.

Changelog

0.17.0

• Refactored parallax header calculations to keep their scroll speeds consistent with user scroll speed.
• Parallax effect is now calculated using the backgroundSpeed prop.