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expo-image-editor

v1.7.1

Published

A super simple image cropping and rotation tool for Expo that runs on iOS, Android and Web!

Downloads

955

Readme

🌁 Expo Image Editor

A super simple image cropping and rotation tool for Expo that runs on iOS, Android and Web!

| Screenshot_20201013-161416 | Screenshot_20201013-161447 | Screenshot_20201013-161347 | | ----------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- |

Check out the demo on Netlify here

Installation

To get started install the package in your Expo project by running:

yarn add expo-image-editor

or

npm i expo-image-editor

Usage

The package exports a single component ImageEditor that can be placed anywhere in your project. This renders a modal that then returns the editing result when it is dismissed.

// ...
import { ImageEditor } from "expo-image-editor";

function App() {
  const [imageUri, setImageUri] = useState(undefined);

  const [editorVisible, setEditorVisible] = useState(false);

  const selectPhoto = async () => {
    // Get the permission to access the camera roll
    const response = await ImagePicker.requestCameraRollPermissionsAsync();
    // If they said yes then launch the image picker
    if (response.granted) {
      const pickerResult = await ImagePicker.launchImageLibraryAsync();
      // Check they didn't cancel the picking
      if (!pickerResult.cancelled) {
        launchEditor(pickerResult.uri);
      }
    } else {
      // If not then alert the user they need to enable it
      Alert.alert(
        "Please enable camera roll permissions for this app in your settings."
      );
    }
  };

  const launchEditor = (uri: string) => {
    // Then set the image uri
    setImageUri(uri);
    // And set the image editor to be visible
    setEditorVisible(true);
  };

  return (
    <View>
      <Image
        style={{ height: 300, width: 300 }}
        source={{ uri: imageData.uri }}
      />
      <Button title="Select Photo" onPress={() => selectPhoto()} />
      <ImageEditor
        visible={editorVisible}
        onCloseEditor={() => setEditorVisible(false)}
        imageUri={imageUri}
        fixedCropAspectRatio={16 / 9}
        lockAspectRatio={aspectLock}
        minimumCropDimensions={{
          width: 100,
          height: 100,
        }}
        onEditingComplete={(result) => {
          setImageData(result);
        }}
        mode="full"
      />
    </View>
  );
}

Props

| Name | Type | Description | | --------------------------- | -------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | visible | boolean | Whether the editor should be visible or not. | | asView | boolean | If true this will remove the modal wrapper and return the image editor in a regular <View /> | | mode | string | Which mode to use the editor in can be either full or crop-only. | | onCloseEditor | function | Callback when the editor is dimissed - use this to set hide the editor. | | imageUri | string | The uri of the image to be edited | | fixedCropAspectRatio | number | The starting aspect ratio of the cropping window. | | lockAspectRatio | boolean | Whether the cropping window should maintain this aspect ratio or not. | | minimumCropDimensions | object | An object of {width, height} specifying the minimum dimensions of the crop window. | | onEditingComplete | function | function that will return the result of the image editing which is an object identical to imageData | | throttleBlur | boolean | Whether to throttle the WebGL update of the blur while adjusting (defaults to false) - useful to set to true on lower performance devices | | allowedTransformOperations | string[] | Which transform operations you want to exclusively allow to be used. Can include crop and rotate e.g. ['crop'] to only allow cropping | | allowedAdjustmentOperations | string[] | Which image adjustment operations you want to exclusively allow to be used. Only blur can be specified at the minute e.g. ['blur'] yo only allow blur as an image adjustment |