How to edit files (e.g. .txt) from the Files app directly in Textastic

In the Files app, open the context menu of the file and select "Share". Then select Textastic. From now on it should open files with the same file extension in Textastic.

Alternatively, you can use the "Open…" command in Textastic to pick a file using the Files user interface.

Thx - I had no idea how this can work but it does. Would be great if iOS has a mechanism to select a specific app for different files, it seems not. Would it be possible to let Textastic do this in the Textastic settings?

Using the "Share" command method I mentioned, you can select a specific app for different file extensions. So if you use share to open Textastic for .txt, and another app for .md for example, the system will remember this selection.

I also wish this would have a better UI - similar to the Mac, but that would be something Apple has to change.