NumberFormatter on iOS 15

Question

Created Dec ’21

Replies 3

Boosts 0

Participants 4

let formatter = NumberFormatter()
        formatter.numberStyle = .decimal
        formatter.minimumFractionDigits = 18
        formatter.maximumFractionDigits = 18
        formatter.roundingMode = .floor
        
        let number = NSDecimalNumber(string: "6.381569271192148411")
        let result = formatter.string(from: number)
        print(result!)

iOS 15: 6.381569271192150000

iOS 14: 6.381569271192148411

Boost

Answer 1

robnotyou OP

Dec ’21

Do you have a question?

0

Answer 2

Claude31 OP

Dec ’21

I tested with Xcode 13.2ß2 in Playground. Effectively get the same result as you.

I changed for this:

let formatter = NumberFormatter()
formatter.usesSignificantDigits = true
formatter.minimumSignificantDigits = 18
formatter.maximumSignificantDigits = 20

let number = NSDecimalNumber(string: "6.381569271192148411")
let result = formatter.string(from: number)

print("result", result!)

I get:

result 6.381569271192148411

So correct result, but don't know what changed in API in iOS 15. Could ask support.

0

Answer 3

000022 OP

Jan ’22

Also encountered this issue with iOS 15 after moving to xcode 13. Made a feedback report: FB9840346

Anyone has any idea what's happening here?

The workaround above isnt exactly right, because maximumSignificantDigits property is widely different from maximumFractionDigits

0