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react-native-image-crop-tools

v1.6.4

Published

Native image crop tools with embeddable UI and on the fly aspect ratio switchin

Downloads

12,593

Readme

react-native-image-crop-tools

Previews

Getting started

$ yarn add react-native-image-crop-tools

Mostly Automatic installation

Only RN > 0.61.x is supported.

  • Android: Installation is automatic.
  • iOS: Add pod 'react-native-image-crop-tools', :path => '../node_modules/react-native-image-crop-tools' in your podfile below the line use_native_modules!. Then run pod installin iOS folder.

Why another cropping library?

Most cropping tools available for RN are usually wrappers over popular native tools which itself isn't a bad thing. But this means you are stuck with their UI and feature set. The ones made in RN are not the most optimized and correct tools.

Features

  1. Native views. Which means performance even on low end devices.
  2. You can embed the view into you own UI. It's not very customizable (yet)
  3. Change and lock/unlock aspect ratio on the fly (This is the main reason I am making this library)

NOTE

This library is not supposed to work directly with remote images. There are very few usecases for that. You need to provide a sourceUrl string for a local file which you can obtain from image pickers or by downloading a remote file with rn-fetch-blob

Usage

import { CropView } from 'react-native-image-crop-tools';

        <CropView
          sourceUrl={uri}
          style={styles.cropView}
          ref={cropViewRef}
          onImageCrop={(res) => console.warn(res)}
          keepAspectRatio
          aspectRatio={{width: 16, height: 9}}
        />

Two methods are exposed on the ref you can use them as follows

  this.cropViewRef.saveImage(true, 90 // image quality percentage)
  this.cropViewRef.rotateImage(true // true for clockwise, false for counterclockwise)

Props

| Name | Description | Default | | ---- | ----------- | ------- | | sourceUrl | URL of the source image | null | | aspectRatio | Aspect ratio of the cropped image | null | | keepAspectRatio | Locks the aspect ratio to given aspect ratio | false | | iosDimensionSwapEnabled | (iOS Only) Swaps the width and height of the crop rectangle upon rotation | false |

TODO:

  • [x] Add screenshots
  • [x] Support transparency
  • [ ] Add access to prebuilt UI for those who want to use it.