react-native-gallery

A pure JavaScript image gallery component for react-native apps with common gestures like pan, pinch and doubleTap, supporting both iOS and Android.

This component aims to be (one of ) the best image viewer for react-native apps. Comparing with other gallery alike components, this one should be more elegant in following aspects: (mimics iOS system photo album app)

Gesture handle: besides common pan, pinch and doubleTap, this component does well in targeting foucs point( or pivot) when zoom-in and zoom-out.
Responder switch: the gesture responder switch is more flexible than any other component, that is, the scrollable container and the wrapped image children perform well in acquiring and releasing gesture responder from/to each other.

This component works on react-native 0.28+ and only supports remote images for now.

Install

npm install --save react-native-gallery@latest

Documentaion

Quite easy to use:

import Gallery from 'react-native-gallery';
...

  render() {
    return (
      <Gallery
        style={{flex: 1, backgroundColor: 'black'}}
        images={[
          'http://p10.qhimg.com/t019e9cf51692f735be.jpg',
          'http://ww2.sinaimg.cn/mw690/714a59a7tw1dxqkkg0cwlj.jpg',
          'http://www.bz55.com/uploads/allimg/150122/139-150122145421.jpg'
        ]}
      />
    );
  }

This component utilizes @ldn0x7dc/react-native-view-pager as the scrollable container and react-native-transformable-image as the wrapped image.

Props

images: array, contains image urls
initialPage, pageMargin, onPageSelected, onPageScrollStateChanged, onPageScroll: inherited from @ldn0x7dc/react-native-view-pager. Check the link for more details.
onSingleTapConfirmed: Called after user single taped( not a double tap)
onGalleryStateChanged: function. (idle) => {}.
loader: React component that will be displayed before each image has been loaded. For instance, you could use ActivityIndicator.
onSlideUp: function, it's performing when user make swipe gesture on image up (it can be helpful for closing view).
onSlideDown: function, it's performing when user make swipe gesture on image down (it can be helpful for closing view).

Add your custom views above image

It's a common practice to float a comment box or like button above the image. This component provides a convenient interface to implement this feature:

onSingleTapConfirmed(): a good time for you to display the responding floating view.
onGalleryStateChanged(idle): If idle is false, it's a good time for your to hide any floating views.

Check the Demo project for a simple demonstration.

Attention

This component is being actively developed but should be ready for production realease.

If you encounter any problem that seems unnormal, just create an issue or check out the latest release.

TODO

Dump off-screen images for better performance if needed