React Native Download image from url and save in Gallery

I want download image from URL and save in the Gallery.

This source works well on Android, but not iOS.

import RNFetchBlob from "rn-fetch-blob";


let imgUrl = 'https://static.scientificamerican.com/sciam/cache/file/EAF12335-B807-4021-9AC95BBA8BEE7C8D_source.jpg'

let newImgUri = imgUrl.lastIndexOf('/');
let imageName = imgUrl.substring(newImgUri);

let dirs = RNFetchBlob.fs.dirs;
let path = Platform.OS === 'ios' ? dirs['MainBundleDir'] + imageName : dirs.PictureDir + imageName;

 RNFetchBlob.config({
     fileCache: true,
     appendExt: 'png',
     indicator: true,
     IOSBackgroundTask: true,
     path: path,
     addAndroidDownloads: {
         useDownloadManager: true,
         notification: true,
         path: path,
         description: 'Image'
      },

     }).fetch("GET", imgUrl).then(res => { 
            console.log(res, 'end downloaded') 
   });

witch one Permissions I needs for iOS, to save Photo in the Gallery?

You have to use camera roll.

• npm install @react-native-community/cameraroll --save

• react-native link @react-native-community/cameraroll

• from:

  import { CameraRoll } from "react-native";

  to

  import CameraRoll from "@react-native-community/cameraroll";