I believe you have to double-tap the cell to type in it on the iOS version, and it will zoom in on the cell and give you the keyboard. And always make sure you are importing the files onto your iPod while connected to Wi-Fi. This will let the iPod download anything necessary to make the Numbers file compatible with iOS. If the keyboard truly doesn't appear, try one of these:
- Instead of using iCloud, try just emailing yourself the file. Then open it in your Mail app on the iPod. When finished editing, email it again.
- Start all spreadsheets on your iPod, but don't edit them. Then send them to your Mac for editing. If your spreadsheets are started on your iOS device you just might be able to edit them correctly.
- Uninstall Numbers on your iPod and reinstall it. This might take away glitches. You can always reinstall directly from the App Store on your iPod without paying again. If you have any spreadsheets you wish to save, send them to your Mac or by email, or use iCloud.
- Tell Apple about your problem at http://www.apple.com/feedback/. They will try to fix the bug.
Let me know if I helped!
I believe you have to double-tap the cell to type in it on the iOS version
That was the key! I guess that's another one of those non-obvious, hard-to-discover GUI elements. It is mentioned in the "Getting Started" document under "Editing Cells".
Now that I've edited and saved the file on my iPod touch the compatibility message has disappeared.