When the usesGroupingSeparator is set to yes on iOS18, the groupingSize value becomes 3. groupingSize is different from 0 in earlier iOS18 versions. Is it a bug or will the subsequent official version also make relevant adjustments? We need to adapt the app in advance。 let formatter = NumberFormatter() let temp = NSNumber(floatLiteral: value) formatter.usesGroupingSeparator = true; print(formatter.string(from: temp) ?? "","--",formatter.groupingSize) Print results below: iOS18 2222222 -- 0 earlier iOS18 2,222,222 -- 3
Oh, that’s weird. Arguably the new behaviour is better, but I can certainly see how a change of behaviour might cause problems. I recommend that you file a bug about this. Please post your bug number, just for the record.
Having said that, can you explain more about how you encountered this? In general, you shouldn’t use NumberFormatter without setting the numberStyle property. And, if you set that property to .decimal, you get grouping separators based on your locale.
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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