Please have a look at this topic in the iOS feedback forum: http://feedback.textasticapp.com/topic/454769-swif...

Yes, that would be a better solution than the workaround I mentioned.

You could tap-and-hold the file and choose "Open" to open the file in the editor instead of opening a preview. Then you can select "Download Latest".

Updated to latest version.

There is now a basic syntax definition for Swift available for Textastic:

This is a repackaged version of the Sublime Text package for the Swift programming language that you can find at github.com/quiqueg/Swift-Sublime-Package.

Installation

Instructions for the iPad and iPhone version of Textastic:

• Create a folder called #Textastic under Local Files if it doesn't exist. If it is named correctly, it will have a special folder icon with a gear symbol.
• Open this link in Safari on your iOS device: http://www.textasticapp.com/support/Swift.tmbundle.zip
• Select "Open In" and choose "Open in Textastic".
• When Textastic asks if you want to unpack the file Swift.tmbundle.zip, select Yes.
• There should now be a folder Swift.tmbundle under Local Files. If you can't see this folder, pull the file listing down to refresh it.
• Move the folder Swift.tmbundle to the #Textastic folder you created above. You can do this with the "Edit" button - see How can I move, copy and rename files and folders?
• Restart Textastic.
• After you start the app, the Swift syntax definition can be chosen in the File Properties popover. It will be used automatically for .swift files.

Congratulations! You can now view Apple's Swift sample code right on your iOS device.

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For more detailed installation information with screenshots, please have a look at the installation instructions in Textastic's manual:

• for iPad
• for iPhone
• for Mac

Screenshot

Hello,

sorry, but this is not supported. Among other things, Textastic requires AutoSave to work properly with iCloud. 

What you can do, is enable this setting in System Preferences -> General:



This will ask you if you want to keep your changes when you close a file and allow you to revert the changes.