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react-native-parallax-header-view

Parallax header view for react-native.

this repository is migrated from this repository

Installation

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

Demo

parallax view demo

NOTE:

Example

import React from 'react';
import ParallaxView from 'react-native-parallax-header-view';
import {StyleSheet, ScrollView, View, Text, RefreshControl} from 'react-native';

import {
  LearnMoreLinks,
  Colors,
  DebugInstructions,
  ReloadInstructions,
} from 'react-native/Libraries/NewAppScreen';

const App: () => React$Node = () => {
  const backgroundStyle = {
    opacity: 0.2,
    overflow: 'visible',
    resizeMode: 'cover',
    marginLeft: -128,
    marginBottom: -192,
  };

  const headerStyle = {
    fontSize: 40,
    fontWeight: '600',
    textAlign: 'center',
    paddingTop: 80,
    color: Colors.black,
  };

  const parallaxViewStyle = {paddingTop: 20};

  const [refreshing, setRefreshing] = React.useState(false);

  const wait = timeout => {
    return new Promise(resolve => {
      setTimeout(resolve, timeout);
    });
  };

  const onRefresh = React.useCallback(() => {
    setRefreshing(true);

    wait(2000).then(() => setRefreshing(false));
  }, [refreshing]);

  return (
    <ParallaxView
      backgroundSource={require('./logo.png')}
      windowHeight={250}
      backgroundStyle={backgroundStyle}
      headerStyle={headerStyle}
      style={parallaxViewStyle}
      maxBlur={10}
      miniBlur={2}
      refreshControl={
        <RefreshControl refreshing={refreshing} onRefresh={onRefresh} />
      }
      header={<Text style={headerStyle}>Welcome to React</Text>}>
      <View>
        <ScrollView
          contentInsetAdjustmentBehavior="automatic"
          style={styles.scrollView}>
          <View style={styles.body}>
            <View style={styles.sectionContainer}>
              <Text style={styles.sectionTitle}>Step One</Text>
              <Text style={styles.sectionDescription}>
                Edit <Text style={styles.highlight}>App.js</Text> to change this
                screen and then come back to see your edits.
              </Text>
            </View>
            <View style={styles.sectionContainer}>
              <Text style={styles.sectionTitle}>See Your Changes</Text>
              <Text style={styles.sectionDescription}>
                <ReloadInstructions />
              </Text>
            </View>
            <View style={styles.sectionContainer}>
              <Text style={styles.sectionTitle}>Debug</Text>
              <Text style={styles.sectionDescription}>
                <DebugInstructions />
              </Text>
            </View>
            <View style={styles.sectionContainer}>
              <Text style={styles.sectionTitle}>Learn More</Text>
              <Text style={styles.sectionDescription}>
                Read the docs to discover what to do next:
              </Text>
            </View>
            <LearnMoreLinks />
          </View>
        </ScrollView>
      </View>
    </ParallaxView>
  );
};

const styles = StyleSheet.create({
  scrollView: {
    backgroundColor: Colors.lighter,
  },
  body: {
    backgroundColor: Colors.white,
  },
  sectionContainer: {
    marginTop: 32,
    paddingHorizontal: 24,
  },
  sectionTitle: {
    fontSize: 24,
    fontWeight: '600',
    color: Colors.black,
  },
  sectionDescription: {
    marginTop: 8,
    fontSize: 18,
    fontWeight: '400',
    color: Colors.dark,
  },
  highlight: {
    fontWeight: '700',
  },
});

export default App;

Props

Prop Required Default Type Description
backgroundSource YES null object this style defines background image style
backgroundStyle NO null object the source prop that get's passed to the background <Image> component. If left blank, no background is rendered
miniBlur NO null number This defines the minimum value of image blur. The default value is 0.
maxBlur NO null number This defines the maximum value of image blur. The default value is 0.
header NO null renderable any content you want to render on top of the image. This content's opacity get's animated down as the scrollview scrolls up. (optional)
windowHeight NO 300 number the resting height of the header image. If 0 is passed in, the background is not rendered.
scrollableViewStyle NO null object this style will be mixed (overriding existing fields) with scrollable view style (view which is scrolled over the background)
... NO ...ScrollViewProps {...this.props} is applied on the internal ScrollView (excluding the style prop which is passed on to the outer container)

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