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You cannot run Swift code on your iPad using Textastic. The preview (glasses) button opens a web view and allows you to preview HTML (Javascript, CSS) and Markdown files.
Yes, please. You can send it by email to support@textasticapp.com

A step-by-step guide about how to reproduce the issue would be nice.
Did you put the files directly in this folder and not in a subfolder?

~/Library/Containers/com.textasticapp.textastic-mac/Data/Library/Application Support/Textastic
You are right, the standard Emmet keyboard shortcuts conflict with emacs commands.

As a workaround, you can go to your Mac's System Preferences -> Keyboard -> Shortcuts -> App Shortcuts and override the standard shortcuts for those two commands with other shortcuts. Here are screenshots of how this might look:





If you do this, you can use ctrl+a and ctrl+e as you are used to.

I could reproduce the problem. This will be fixed in the next update. Thanks for reporting this issue!
I assume you are using the "Open…" command in Textastic to open the file from ownCloud. Does the same happen when you try to open and save such a file with another editor that supports the document picker like Byword?

I do not have an ownCloud server myself.
If you purchase the latest version of Textastic for iPad in iTunes on a Mac or PC or on another iOS device that runs iOS 8, you can download the last compatible version from the Purchased section in the App Store on your iOS 7 device. Just make sure you are using the same iTunes account.

This is explained in this Apple support article: http://support.apple.com/en-us/HT201377
Ah, ok, I just saw that you did successfully reference the Firebug server directly. So yes, that's the workaround in this case.