When are iOS 7 new icons going to be supported on flash cc?

There isn’t anything in the UI to let you select all the sizes, that will come in the next update hopefully (which won’t be for a few months). But, you can edit the app descriptor XML to add the missing sizes, and Flash CC will not delete those new lines.

For what it’s worth, when you switch between iOS and Android publishing of the same app, all the icons are deleted from the XML, so you need to find a solution to that problem. I keep a text file like this:

http://xfiles.funnygarbage.com/~colinholgate/files/iconsets.txt

and I just copy and paste the right block of icons into the XML. That way with a new app I don’t even have to select a single size in Flash, let alone 18 of them.

If you’re seeing the new sizes be deleted from the XML, either you’re using something earlier than the release version of AIR 3.9, or you haven’t done the Flash CC update from last week.