react-native-image-cache-wrapper

react-native-image-cache-wrapper

The best react native image cache wrapper.

Feature

• the same usage with <Image/> and <ImageBackground/>
• can set activity indicator
• cache images with expiration
• clear one cache or all cache files
• support getSize() and prefetch()
• support cache base64 data to local

Installation

We use react-native-fetch-blob to handle file system access in this package, So you should install react-native-image-cache-wrapper and react-native-fetch-blob both.

npm install react-native-image-cache-wrapper --save

npm install react-native-fetch-blob --save
react-native link react-native-fetch-blob

or use yarn

yarn add react-native-image-cache-wrapper
yarn add react-native-fetch-blob

ChangeLog

v1.0.0

1. initial release

Configuration

Property	Type	Default	Description	FirstRelease
<Image/> or <ImageBackground> properties			same with <Image/> and <ImageBackground/>	1.0
expiration	number	604800	expiration seconds (0:no expiration, default cache a week)	1.0
activityIndicator	Component	null	when loading show it as an indicator, you can use your component	1.0

Usage

import CachedImage from 'react-native-image-cache-wrapper';

render()
{
    return (

            <View>
                <CachedImage source={{uri:"https://assets-cdn.github.com/images/modules/logos_page/Octocat.png"}}/>
                <CachedImage source={{uri:"https://assets-cdn.github.com/images/modules/logos_page/Octocat.png"}}/>
                    <Text>This is example with image background.</Text>
                </CachedImage>
            </View>
        );
}

Static Function

CachedImage.getSize(url, success=(width,height)=>void,fail=(error)=>void)

Get the image size, if no cache, will cache it.

Example:

import CachedImage from 'react-native-image-cache-wrapper';

CachedImage.getSize("https://assets-cdn.github.com/images/modules/logos_page/Octocat.png", 
    (width,height)=>{
        console.log("width:"+width+" height:"+height);
    },(error)=>{
        console.log("error:"+error);
    });

CachedImage.prefetch(url,expiration=0,success=(cachFile)=>void,fail=(error)=>void)

prefetch an image and cache it.

Example:

import CachedImage from 'react-native-image-cache-wrapper';

// prefetch and cache image 3600 seconds
CachedImage.prefetch("https://assets-cdn.github.com/images/modules/logos_page/Octocat.png", 3600, 
    (cacheFile)=>{
        console.log("cache filename:"+cacheFile);
    },(error)=>{
        console.log("error:"+error);
    });

CachedImage.deleteCache(url)

delete a cache file.

Example:

import CachedImage from 'react-native-image-cache-wrapper';

// prefetch and cache image 3600 seconds
CachedImage.deleteCache("https://assets-cdn.github.com/images/modules/logos_page/Octocat.png");

CachedImage.clearCache()

clear all cache.

Example:

import CachedImage from 'react-native-image-cache-wrapper';

// prefetch and cache image 3600 seconds
CachedImage.clearCache();