README.md

RNParallax (react-native-parallax-header)

• A react native scroll view component with Parallax header :p
• Inspired by GitHub - jaysoo/react-native-parallax-scroll-view
• Code is based on React Native ScrollView animated header – App & Flow – Medium and added little customisation :p

Installation

$ npm i react-native-parallax-header --save

Demo

iPhone X or XS

iPhone 8

Example

import Icon from 'react-native-vector-icons/MaterialIcons';
import ReactNativeParallaxHeader from 'react-native-parallax-header';

const IS_IPHONE_X = SCREEN_HEIGHT === || SCREEN_HEIGHT === 896;
const STATUS_BAR_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 44 : 20) : 0;
const HEADER_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 88 : 64) : 45;
const NAV_BAR_HEIGHT = HEADER_HEIGHT - STATUS_BAR_HEIGHT;

const viewImages = {
  background: require('../../../img/test.jpg'),
};

const styles = StyleSheet.create({
  navContainer: {
    height: HEADER_HEIGHT,
    marginHorizontal: 10,
  },
  statusBar: {
    height: STATUS_BAR_HEIGHT,
    backgroundColor: Colors.transparent,
  },
  navBar: {
    height: NAV_BAR_HEIGHT,
    justifyContent: 'space-between',
    alignItems: 'center',
    flexDirection: 'row',
    backgroundColor: Colors.transparent,
  },
  innerContainer: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    margin: 10,
  },
  titleStyle: {
    color: Colors.white,
    fontWeight: 'bold',
    fontSize: 18,
  },
});

renderNavBar = () => (
  <View style={styles.navContainer}>
    <View style={styles.statusBar} />
    <View style={styles.navBar}>
      <TouchableOpacity style={styles.iconLeft} onPress={() => {}}>
        <Icon name="add" size={25} color="#fff" />
      </TouchableOpacity>
      <TouchableOpacity style={styles.iconRight} onPress={() => {}}>
        <Icon name="search" size={25} color="#fff" />
      </TouchableOpacity>
    </View>
  </View>
)

render() {
  return (
    <View style={commonStyles.container}>
      <ReactNativeParallaxHeader
        headerMinHeight={HEADER_HEIGHT}
        headerMaxHeight={250}
        extraScrollHeight={20}
        navbarColor={Colors.primary}
        title="Parallax Header ~"
        titleStyle={styles.titleStyle}
        backgroundImage={viewImages.background}
        backgroundImageScale={1.2}
        renderNavBar={this.renderNavBar}
        renderContent={this.renderContent}
        contentContainerStyle={{ flexGrow: 1 }}
        containerStyle={{ flex: 1 }}
      />
    </View>
  );
}

API Usage

Property	Type	Required	Description	Default
renderNavBar	func	No	This renders the nav bar component	Empty <View />
renderContent	func	YES	This renders the scroll view content	-
headerMaxHeight	number	No	This is the header maximum height	Default to 200
headerMinHeight	number	No	This is the header minimum height	Default to common ios & android navbar height (have support for iPhone X too :p)
backgroundImage	image source	No	This renders the background image of the header (if specified, background color will not take effect)	Default is null
backgroundImageScale	number	No	This is the image scale - either enlarge or shrink (after scrolling to bottom & exceed the headerMaxHeight)	Default is 1.5
backgroundColor	string	No	This is the color of the parallax background (before scrolling up), will not be used if backgroundImage is specified	Default color is #303F9F
extraScrollHeight	number	No	This is the extra scroll height (after scrolling to bottom & exceed the headerMaxHeight)	Default is 50
navbarColor	string	No	This is the background color of the navbar (after scroll up)	Default color is #3498db
title	string	No	This is the title to be display in the header	Default is empty string ‘’
titleStyle	style	No	This is the title style to override default font size/color	Default to color: ‘white’ text and fontSize: 16
scrollEventThrottle	number	No	This is the scroll event throttle	Default is 16
contentContainerStyle	style	No	This is the contentContainerStyle style to override default <ScrollView> contentContainerStyle style	Default to null
contentStyle	style	No	This is the inner content style to override default <View> style inside <ScrollView> component	Default to null