My first app update just went live last night and I've gotten a complaint that the update caused the user-created data (some of it) to disappear. I have been able to reproduce the problem, but can't tell why.
In the Documents directory, I have saved one key file which tells me the "title" of all the user's files and their filenames (full path). Then all the user's files are also in the Documents directory.
When the update occurs, the key file is still there (at least, I think it is because the data shows up in the first screen of the app - apps do fully quit and relaunch after updating, right?), but when the user tries to navigate into the actual files, there is no data and any new data the user types in is never saved.
It's acting exactly as it did in debugging when I was accidentally using an invalid filename (with improper characters in it) - it never saved. But with the update, these files had been saved properly in the old version but are somehow failing in the new version.
This is my first app and my first update and I'm quite at a loss here. I've pulled the app from sale for the moment (didn't know you couldn't simply revert to an old version! yikes!) and would deeply appreciate any ideas as to where/how to look for the problem and how to write a GOOD update that won't lose the data. (So far, all I've found is "save data in the Documents directory", which is what I was already doing.)
I do have the original app saved in its own project and I can go back and work from that again. I copied that whole directory when I started working on the update and I do wonder if that could somehow be the problem? I did change the name of the directory that holds all the XCode files and used the Project>Rename function. Could that have this effect somehow?
The app (both original and update) is running on 4.2 and above, if that matters.
RESOLUTION:
I believe I have figured out this problem. Like I sa