README

react-native-photo-view-ex

Provides custom Image view for React Native that allows to perform pinch-to-zoom on images. Works on both iOS and Android.

This component uses PhotoDraweeView for Android and MWPhotobrowser on iOS.

About this fork

This fork is based on the great work of @alwx (Alexander Pantyuhov) and has this changes:

Android Build Tools 28.0.3 and targetSdkVersion 28 (configurable).
Peer dependent on react-native v0.57 and above.
Using the same version of fresco included by react-native.
Updated dependencies
- Relex photodraweeview v1.1.3
- Android plugin for Gradle v4.10.x
Changes to gradle config to support the new version.
Changes to some properties, mainly androidScaleType replaced by resizeMode.
PhotoView as PureComponent.
Minor fixes.
Typescript definitions.

All this is to adapt it better to my current project (it is not tested on iOS), but feel free to use it.

Usage

import PhotoView from 'react-native-photo-view-ex';

Basics:

  <PhotoView
    source={{uri: 'https://facebook.github.io/react/img/logo_og.png'}}
    minimumZoomScale={0.5}
    maximumZoomScale={3}
    resizeMode="center"
    onLoad={() => console.log("Image loaded!")}
    style={{width: 300, height: 300}}
  />

Properties

Property	Type	Description
source	Object	The same as `source` for other React images, except that it does not handle arrays.
loadingIndicatorSource	Object	Similarly to `source`, but used to render the loading indicator. Must be a local image
fadeDuration	int	Duration of the fade, in milliseconds.
scale	float	Zoom scale
maximumZoomScale	float	The maximum allowed zoom scale. The default value is 3.0
minimumZoomScale	float	The minimum allowed zoom scale. The default value is 1.0
resizeMode	String	Android only: One of "center", "contain", "cover", "fitStart", "fitEnd", "stretch". The default is "cover"
style	Array or Object	Subset of react-native style. See index.d.ts
showsHorizontalScrollIndicator	bool	iOS only: When true, shows a horizontal scroll indicator. The default value is `true`.
showsVerticalScrollIndicator	bool	iOS only: When true, shows a vertical scroll indicator. The default value is `true`.
zoomTransitionDuration	int	Android only: Double-tap zoom transition duration, in milliseconds.

Events

Name	Parameter *	Description
onError	-	Invoked on load error.
onLayout	`layout: {x, y, width, height}`	Invoked on mount and layout changes.
onLoad	-	Invoked when load completes successfully.
onLoadEnd	-	Invoked when load either succeeds or fails.
onLoadStart	-	Invoked on load start.
onProgress	`loaded, total`	iOS only: Invoked on download progress.
onScale	`scale, scaleFactor, focusX, focusY`	Callback function called on scale changes.
onTap	`scale, x, y`	Callback function called on image tap.
onViewTap	`scale, x, y`	Callback function called on tap outside of the image.

* In the nativeEvent property.

Compared to react-native-image-zoom

react-native-image-zoom functionality is similar, but there are several major differencies:

PhotoView is based on PhotoDraweeView which is the "PhotoView For Fresco". It works better, it supports several important callbacks out-of-box and it is, actually, recommended by Chris Banes, because his PhotoView (base for react-native-image-zoom) doesn't completely support Facebook Fresco.
PhotoView has more options like fadeDuration and minimumZoomScale/maximumZoomScale and more important callbacks.
PhotoView is written in the same manner as default React Image, and it supports most of the features Image has (the goal is to be fully compaitable with Image and support absolutely everything).
It is possible to use PhotoView as a container (currently iOS only)!

Automatic installation

Just two simple steps:

yarn add react-native-photo-view-ex
react-native link react-native-photo-view-ex

Manual installation

Android

Add these lines to android/settings.gradle

include ':react-native-photo-view-ex'
project(':react-native-photo-view-ex').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-photo-view-ex/android')

Add the dependency to android/app/build.gradle

dependencies {
  implementation project(':react-native-photo-view-ex')
}

import io.amarcruz.photoview.PhotoViewPackage;

// ...

public class MainActivity extends ReactActivity {
  // ...

  @Override
  protected List<ReactPackage> getPackages() {
    return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
        new PhotoViewPackage() // add this manager
    );
  }

  // ...
}

iOS

Add this line to your podfile

pod 'react-native-photo-view-ex', path: './node_modules/react-native-photo-view-ex'

Run pod install

Usage no npm install needed!