react-native-image-picker-with-bytes

react-native-image-picker

A React Native module that allows you to use the native UIImagePickerController UI to either select a photo from the device library or directly from the camera, like so:

Requires iOS 8 or higher

Install

1. npm install react-native-image-picker@latest --save
2. In the XCode's "Project navigator", right click on your project's Libraries folder ➜ Add Files to <...>
3. Go to node_modules ➜ react-native-image-picker ➜ select the UIImagePickerManager folder Make sure you have 'Create Groups' selected
4. Make sure UIImagePickerManager.m is listed under 'Compile Sources' in your project's 'Build Phases' tab
5. Compile and have fun!

Usage

1. In your React Native javascript code, bring in the native module:

var UIImagePickerManager = require('NativeModules').UIImagePickerManager;

1. Use it like so:

When you want to display the picker:

// Specify any or all of these keys
var options = {
  title: 'Select Avatar', // specify null or empty string to remove the title
  cancelButtonTitle: 'Cancel',
  takePhotoButtonTitle: 'Take Photo...', // specify null or empty string to remove this button
  chooseFromLibraryButtonTitle: 'Choose from Library...', // specify null or empty string to remove this button
  customButtons: {
    'Choose Photo from Facebook': 'fb', // [Button Text] : [String returned upon selection]
  },
  maxWidth: 100,
  maxHeight: 100,
  quality: 0.2,
  allowsEditing: false, // Built in iOS functionality to resize/reposition the image
  noData: false, // Disables the base64 `data` field from being generated (greatly improves performance on large photos)
  storageOptions: { // if this key is provided, the image will get saved in the documents directory (rather than a temporary directory)
    skipBackup: true, // image will NOT be backed up to icloud
    path: 'images' // will save image at /Documents/images rather than the root
  }
};

// The first arg will be the options object for customization, the second is
// your callback which sends bool: didCancel, object: response.
//
// response.data is the base64 encoded image data
// response.uri is the uri to the local file asset on the device
// response.isVertical will be true if the image is vertically oriented
// response.width & response.height give you the image dimensions
UIImagePickerManager.showImagePicker(options, (didCancel, response) => {
  console.log('Response = ', response);

  if (didCancel) {
    console.log('User cancelled image picker');
  }
  else {
    if (response.customButton) {
      console.log('User tapped custom button: ', response.customButton);
    }
    else {
      // You can display the image using either:
      const source = {uri: 'data:image/jpeg;base64,' + response.data, isStatic: true};
      const source = {uri: response.uri.replace('file://', ''), isStatic: true};

      this.setState({
        avatarSource: source
      });
    }
  }
});

Then later, if you want to display this image in your render() method:

<Image source={this.state.avatarSource} style={styles.uploadAvatar} />

Directly Launching the Camera or Image Library

To Launch the Camera or Image Library directly (skipping the alert dialog) you can do the following:

// Launch Camera:
UIImagePickerManager.launchCamera(options, (didCancel, response)  => {
  // Same code as in above section!
});

// Open Image Library:
UIImagePickerManager.launchImageLibrary(options, (didCancel, response)  => {
  // Same code as in above section!
});