Rn-fetch-blob: Ios: Failed to create directory, don’t have permission to save the file

[DjailinVasu]

• rn-fetch-blob: ^0.12.0,
• react: 16.9.0,
• react-native: 0.61.5,

I get pdf-file from server and save with fs.writeFile method to fs.dirs.DownloadDir directory.
Result file path is: `${DownloadDir}/${filename}.pdf;`
So, my code is:

RNFetchBlob.fetch(..).then(res => {
      const { fs } = RNFetchBlob;
       let { DownloadDir } = fs.dirs;
      const filePath = `${DownloadDir}/${filename}.pdf `;
      <…>
      fs.writeFile(filePath, res.data, "base64").then(res => {…});
});

This works on ios emulators, but failed when I run the application on a real device with ios 13. By default, I can't catch any error. The process of save file dies quietly.

But if I delete line endings from the received file data as follows:

res.data = res.data.replace(/(\r\n|\n|\r)/gm, "");

I get the following error:

I saw similar access problems in other issues, but could not find a solution.

[DjailinVasu]

The issue with iOS has been solved by using DocumentDir. all the other folders from fs.dirs are unavailable for writing files in iOS13

[fabio-jreis]

The issue with iOS has been solved by using DocumentDir. all the other folders from fs.dirs are unavailable for writing files in iOS13

Thanks :)