react-native-image-cropper   

This Image cropper is based on the gl-react-native library

Installation

npm i -S react-native-image-cropper

or

yarn add react-native-image-cropper

Requirements

• gl-react You need to install gl-react. npm i -S gl-react
• gl-react-native You need to install gl-react-native and link the repo in RN. npm i -S gl-react-native & rnpm link
• react-native Android requires you to have RN 0.28 or higher!

{ImageCrop} Props

• image (required): link to image that should be cropped.
• cropHeight (required): height of the image in cropped size.
• cropWidth (required): width of the image in cropped size.
• zoom: range 0 - 100 setting zoom value. where 100 = full zoom. (default: 0)
• maxZoom: max zoom value, should be bigger than minZoom value (default: 100)
• minZoom: min zoom value, should be smaller than maxZoom value (default: 0)
• panToMove: Use pan to move image? (default: true)
• pinchToZoom Use pinch to zoom image? (default: true)
• quality: a value from 0 to 1 to describe the quality of the snapshot. 0 means 0% (most compressed) and 1 means 100% (best quality). (default: 1)
• type: the file type default value is "png", "jpg" is also supported. Refer to implementations to see more supported values. (default: jpg)
• pixelRatio: the pixel ratio to use for the rendering. By default the screen pixel scale will be used.

{ImageCrop} Functions

• crop(): returns a base64 encoded image.

Example

...
import {ImageCrop} from 'react-native-image-cropper'


...
render() {
  return (
  <View>
    <ImageCrop 
      ref={'cropper'}
      image={this.state.image}
      cropHeight={this.state.height}
      cropWidth={this.state.width}
      zoom={this.state.zoom}
      maxZoom={80}
      minZoom={20}
      panToMove={true}
      pinchToZoom={true}
    />
    <Text onPress={this.capture()}>Capture()</Text>
  </View>
    
  )
} 
capture(){
  this.refs.cropper.crop()
  .then(base64 => console.log(base64))
}
...