react-native-image-zoom-viewer

Show Cases

Swiper image

Zoom while sliding

Swipe down

Getting Started

Installation

npm i react-native-image-zoom-viewer --save

Basic Usage

• Install create-react-native-app first

$ npm install -g create-react-native-app

• Initialization of a react-native project

$ create-react-native-app AwesomeProject

• Then, edit AwesomeProject/App.js, like this:

import { Modal } from 'react-native';
import ImageViewer from 'react-native-image-zoom-viewer';

const images = [{
    // Simplest usage.
    url: 'https://avatars2.githubusercontent.com/u/7970947?v=3&s=460',

    // width: number
    // height: number
    // Optional, if you know the image size, you can set the optimization performance

    // You can pass props to <Image />.
    props: {
        // headers: ...
    }
}, {
    url: '',
    props: {
        // Or you can set source directory.
        source: require('../background.png')
    }
}]

export default class App extends React.Component {
    render: function() {
        return (
            <Modal visible={true} transparent={true}>
                <ImageViewer imageUrls={images}/>
            </Modal>
        )
    }
}

Props

parameter	type	required	description	default
imageUrls	array	yes	Image Source
enableImageZoom	boolean	no	Enable image zoom	true
onShowModal	function (content?: JSX.Element) => void	no	The callback for show modal	() => {}
onCancel	function () => void	no	The callback for cancel modal	() => {}
flipThreshold	number	no	Swipe threshold of the next page	80
maxOverflow	number	no	The X position maximum, that current page can slide to the next page	300
index	number	no	Init index of images	0
failImageSource	string, object {url: string}	no	placeholder for fail	''
loadingRender	function () => React.ReactElement<any>	no	placeholder for loading	() => null
onSaveToCamera	function (index?: number => void	no	The callback for save to camera	() => {}
onChange	function (index?: number => void	no	When the image changed	() => {}
onMove	( position: IOnMove )=>void	reports movement position data (helpful to build overlays)	()=> {}
saveToLocalByLongPress	boolean	no	Enable save to camera when long press	true
onClick	function (onCancel?: function) => void	no	Onclick	(onCancel) => {onCancel()}
onDoubleClick	function (onCancel?: function) => void	no	OnDoubleClick	(onCancel) => {onCancel()}
onSave	function (url: string) => void	no	The picture is saved to the local method, if you write this method will not call the system default method for Android does not support saveToCameraRoll remote picture, you can call this callback in Android call native interface
renderHeader	function (currentIndex?: number) => React.ReactElement<any>	no	Custom header	() => null
renderFooter	function (currentIndex?: number) => React.ReactElement<any>	no	Custom footer	() => null
renderIndicator	function (currentIndex?: number, allSize?) => React.ReactElement<any>: number	no	Custom indicator	(currentIndex, allSize) => currentIndex + "/" + allSize
renderImage	function (props: any) => React.ReactElement<any>	no	Custom image component	(props) => <Image {...props} />
renderArrowLeft	function () => React.ReactElement<any>	no	Custom left arrow	() => null
renderArrowRight	function () => React.ReactElement<any>	no	Custom right arrow	() => null
onSwipeDown	function () => void	no	Callback for swipe down	() => null
footerContainerStyle	object {someStyle: someValue}	no	custom style props for container that will be holding your footer that you pass	bottom: 0, position: "absolute", zIndex: 9999
backgroundColor	string white	no	Component background color	black
enableSwipeDown	boolean	no	Enable swipe down to close image viewer. When swipe down, will trigger onCancel.	false
swipeDownThreshold	number	no	Threshold for firing swipe down function
doubleClickInterval	number	no	Double click interval.
pageAnimateTime	number	no	Set the animation time for page flipping.	100
enablePreload	boolean	no	Preload the next image	false
useNativeDriver	boolean	no	Whether to animate using useNativeDriver	false
menus	function ({cancel,saveToLocal}) => React.ReactElement<any>	no	Custom menus, with 2 methods:cancel to hide menus and saveToLocal to save image to camera
menuContext	object {someKey: someValue}	no	Custom menu context.	{ saveToLocal: 'save to the album', cancel: 'cancel' }

Development pattern

Step 1, run TS listener

After clone this repo, then:

npm install
npm start

Step 2, run demo

cd demo
npm install
npm start

Then, scan the QR, use your expo app.

Dependence

Depend on react-native-image-pan-zoom: https://github.com/ascoders/react-native-image-zoom