I'll consider adding this as an option.

I'm glad you found a syntax definition that works for you.

Can you please give me an example of a search term and file names where it doesn't show the files you are looking for to the top of the list? 

Maybe I can improve something in the search algorithm or give you some hints so that the files you are searching for are shown at the top.

Currently the file name search is always fuzzy and searches all subfolders.

What are your file names and what are you searching for that causes problems with the fuzzy search?

You can use this TextMate bundle for Kotlin with Textastic for macOS:

https://github.com/sargunv/kotlin-textmate-bundle

In the menu bar of Textastic for macOS, use Textastic -> Customizations -> Show Customization Folder.

Put the Kotlin.tmbundle folder into the customization folder that is shown in Finder.

Then use the menu Textastic -> Customizations -> Reload Customizations and you should find Kotlin in the list of syntax definitions in the status bar of Textastic.

You can add custom syntax definitions to Textastic by using TextMate bundles or Sublime Text packages. See

https://www.textasticapp.com/v9/manual/customization/custom_syntax_themes_templates.html

A quick search for "Kotlin tmbundle" in Google brought up this TextMate bundle which should work:

https://github.com/sargunv/kotlin-textmate-bundle

While the iOS app has a complete manual, the macOS version of Textastic currently does not really have a proper manual, sorry.

Are you looking for any particular information?

I was hesitant to implement this because you could potentially delete all your data using that.

For example, you could search in your iCloud Drive folder using a regular expression search for something like ".*" that matches all text and replace it with an empty string.

I guess that is true for all other text editors, too, that implement this, but it might still be a nightmare for a user if and when this happens.

I'll consider adding replace in multiple files if I get enough people asking for this feature.

I can reproduce the issue on my iPad.

Thanks a lot for reporting this issue. This is the first time I hear about it.

It almost looks like the iOS system keyboard disables my custom inputAccessoryView for a short moment after entering a key.

I'll try to find out what's going on and hope that I can find a workaround.

Textastic 9.8 with support for Find in Files was released today.

You can find more information in the manual at https://www.textasticapp.com/v10/manual/managing_files/find_in_files.html