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expo-image-manipulator-view

v5.0.1

Published

Crop, rotate and flip images without detach your expo project!

Downloads

187

Readme

Note

This repository was forked from brunon80/expo-image-crop(it is probably no longer maintained). The changes are as follows:

  • Up supported Expo SDK to 52.
  • Support aspect ratio.
  • Support images longer than the screen with scroll.
  • Several icons can be changed.
  • Remove unnecessary dependencies from package.json.
  • Reorganized directory structure.
  • Rewritten to typescript, and type information was provided.

All changes can be found here.

Crop and rotate image without detach your expo project!

Expo.ImageManipulator is only a API without a UI, so you have to build your own UI on top of it, or choose detach your project to use third party linked packages, witch is no so good because a pure javascript Expo project is marvelous!

PRs are welcome...

No more flickering while resizing image mask!

Compatible with Expo SDK 44

Support typescript

Install

yarn add expo-image-manipulator-view

Example

import React from 'react'
import { Dimensions, Button, ImageBackground } from 'react-native'
import { ImageManipulatorView } from 'expo-image-manipulator-view'

export default class App extends React.Component {
  state = {
      isVisible: false,
      uri: 'https://i.pinimg.com/originals/39/42/a1/3942a180299d5b9587c2aa8e09d91ecf.jpg',
  }
  onToggleModal = () => {
      const { isVisible } = this.state
      this.setState({ isVisible: !isVisible })
  }
  render() {
      const { uri, isVisible } = this.state
      const { width, height } = Dimensions.get('window')
      return (
          <ImageBackground
              resizeMode="contain"
              style={{
                  justifyContent: 'center', padding: 20, alignItems: 'center', height, width, backgroundColor: 'black',
              }}
              source={{ uri }}
          >
              <Button title="Open Image Editor" onPress={() => this.setState({ isVisible: true })} />
              <ImageManipulatorView
                  photo={{ uri }}
                  isVisible={isVisible}
                  onPictureChoosed={({ uri: uriM }) => this.setState({ uri: uriM })}
                  onToggleModal={this.onToggleModal}
              />
          </ImageBackground>
      )
  }
}

Props

| Props | Type | Default | Description | |------------------|----------|----------------------------------------------------------------------------|----------------------------------------------------| | isVisible | boolean | false | Show or hide modal with image manipulator UI | | onBeforePictureChoosed | function | | Callback before done. You must return boolean. If you return false, it will stop. | | onPictureChoosed | function | | Callback where is passed image edited as parameter | | photo | object | { uri: string } | uri of image to be edited | | btnTexts | object | { crop: string, done: string, processing: string} | name for crop, done and processing texts | | onToggleModal | function | | Callback called when modal is dismissed | | borderColor | string | #a4a4a4 | Color for crop mask border | | allowRotate | boolean | true | Show rotate option | | allowFlip | boolean | true | Show flip option | | saveOptions | object | { compress: number, format: string, base64: boolean} | A map defining how modified image should be saved
| fixedMask | object | { width: number, height: number } | Width and height fixed mask | ratio | object | { width: number, height: number } | Width and height cropping ratio | icons | object | { crop: ReactNode, back: ReactNode, processing: ReactNode } | Some icons can be changed

Return of onBeforePictureChoosed/onPictureChoosed is an object with format:

{
    uri: string,
    base64: string | undefined, // undefined if base64 is false on saveOptions prop
    width: number,
    height: number,
    cropped: boolean // Whether cropped or not
}

Run the example!

  • Clone this repository
  • cd source/
  • run yarn or npm install
  • enjoy!

The animation is fluid even on dev mode!

Requirements

  • Use it into Expo app (from expo client, Standalone app or ExpoKit app).
  • Because we need to have access to ImageManipulator

Features

  • Crop
  • Rotate
  • Flip (Horizontal and Vertical)
  • Base64

If you have some problem open a issue