Case Study: Sharing Swift Domain Logic Between iOS and Android with FoodshareCore

[Jon_Shier]

@organicnz

DateFormatter didn't conform to Sendable in older Swift versions. This was fixed in PR #5000 (July 2024). If using older Swift, create formatters locally rather than storing as properties:

Please don’t do this. DateFormatters are expensive to create, so if you’re worried about thread safety it’s better to just wrap the static instance in a lock. Repeated formatter creation is an easy way to get frame drops.