Syncing Reliability Issues / iOS 14 Support

[kirvanp]

There are currently some circumstances under which this app doesn't sync perfectly, particularly if devices are offline long periods of time. Currently the syncing is based on iOS 10 technology. Under iOS 13, there are improvements to the syncing of CloudKit records that could make this much more reliable and save over 1,000 lines of code from the app. The improvements would also make the OS responsible for detecting when the internet is available and initiating syncing.

To use these improvements, we need to change the target to iOS 13 or iOS 14. I did submit a set of changes to that effect a year ago that would have raised it to iOS 13. Given that the iPads will upgrade to iOS 14, I think it makes the most sense to target the app to iOS 14 and test accordingly, rather than supporting older iOS versions.

[huguesfcadets]

Hi @kirvanp ,

Could you resubmit the changes, we will look into integrate them into master.

Thanks

[huguesfcadets]

Fixing for current target.