lzhwWeb / react-native-directed-scrollview

A natively implemented scrollview component which lets you specify different scroll directions for child content.

react-native-directed-scrollview

A natively implemented scrollview component which lets you specify different scroll directions for child content.

The iOS implementation extends the default UIScrollView component, whereas the Android implementation is custom and aims to provide some limited parity with the iOS api.

The following props are supported:

Prop	Default	Description
scrollEnabled	true	When false, the view cannot be scrolled via touch interaction.
pinchGestureEnabled	true	When true, ScrollView allows use of pinch gestures to zoom in and out.
minimumZoomScale	1.0	How far the content can zoom out.
maximumZoomScale	1.0	How far the content can zoom in.
bounces	true	Whether content bounces at the limits when scrolling.
bouncesZoom	true	Whether content bounces at the limits when zooming.
alwaysBounceHorizontal	true	When bounces is enabled, content will bounce horizontally.
alwaysBounceVertical	true	When bounces is enabled, content will bounce vertically.
ios showsVerticalScrollIndicator	true	Whether vertical scroll bars are visible.
ios showsHorizontalScrollIndicator	true	Whether horizontal scroll bars are visible.

The following methods are supported:

Method	Example	Description
scrollTo	scrollTo({x: 100, y: 100, animated: true})	Scrolls to a given x and y offset.

Installation

• npm install react-native-directed-scrollview --save
• react-native link (or rnpm link)

Usage

To work properly this component requires that a fixed-size content container be specified through the contentContainerStyle prop.

import ScrollView, { ScrollViewChild } from 'react-native-directed-scrollview';
...

export default class Example extends Component {
  render() {
    return (
      <ScrollView
        bounces={true}
        bouncesZoom={true}
        maximumZoomScale={2.0}
        minimumZoomScale={0.5}
        showsHorizontalScrollIndicator={false}
        showsVerticalScrollIndicator={false}
        contentContainerStyle={styles.contentContainer}
        style={styles.container}
      >
        <ScrollViewChild scrollDirection={'both'}>
          // multi-directional scrolling content here...      
        </ScrollViewChild>
        <ScrollViewChild scrollDirection={'vertical'}>
          // vertically scrolling content here...      
        </ScrollViewChild>
        <ScrollViewChild scrollDirection={'horizontal'}>
          // horizontally scrolling content here...      
        </ScrollViewChild>
      </ScrollView>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  contentContainer: {
    height: 1000,
    width: 1000,
  },
})

See the example project for more detail.