DB48X: HP48-like RPL implementation for DM42

[Orome]

(12-11-2024 10:42 PM)c3d Wrote:  Among the problems that I am aware of:

1) I have not found a way to use the same directory across variants of the application. This is probably only a concern to me, but iOS treats DB48x and DB50x as two entirely distinct applications, even if they share the same file types. According to the documentation, one application should be able to read the documents from the other, but so far, it does not work.

2) The data directories sometimes disappear until you reboot your device. This notably happens when you upgrade (or, in my case, when I install a new version, but not every time).

3) iCloud directories created by one version of the application may become inaccessible by the next version of the same application (this is the "operation not permitted" you saw). What is really weird about this one is that if I start an iPhone simulator from scratch and connect it to my iCloud account, then I can access the directory, but not if I reuse a simulator where the previous version had been installed.

So in short, at the moment, iCloud support is very theoretical. When it works, it works well and you can sync your state files across multiple devices (even an iPhone and iPad in my case), but it sometimes goes boom for reasons that I don't understand yet. Sometimes, just restarting the iPhone fixes the problem, but it seems absolutely insane that you would have to do that.

I'm doing something wrong in the code, but I don't know what yet.

That's a very helpful summary, and coincides exactly with what I'm seeing.

FWIW, what I do to sync macOS and iOS is just use iCloud as a depot and copy and past through their to/from the respective sandboxed folders. (Sometimes I can directly maintain state in macOS in iCloud, but not reliably.)