DEPRECATED

You would not need this package as react-native's Image component does caching. Also, react-native>=0.25 allows prefetch remote images.

react-native-ximage

XImage is an alternative to react native's Image component with cache support. It offers a component and a storage class.

Usage

XImage depends on react-native-fs. You need to install this package frist and link the library using rnpm.

npm i -S react-native-fs
rnpm link

Then install react-native-ximage:

npm i -S react-native-ximage

XImage component

To make XImage download and cache an image, you need to set url prop.

import XImage from 'react-native-ximage`;

// ...
<XImage url="https://facebook.github.io/react/img/logo_og.png"/>

If you want XImage to show a default image while the image is being downloaded or in case for some reason the download process failed, you can set the defaultSource prop as well:

<XImage 
  url="https://facebook.github.io/react/img/logo_og.png"
  defaultSource={require('./images/defaultLogo.jpg')}
/>

Storage options configuration

XImage by default stores the downloaded images in BASE_DIR/.images/ and hashes the URL with md5. If you want to change any of those options you can call two methods on Storage singleton.

import { storage } from 'react-native-ximage/src/Storage';
import sha512 from 'some-crypt-lib';

storage.setCacheDirectory('path/to');
storage.setHashFunction(sha512);