Question 67164 in IOS Swift Question posted in
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Formatting double values ignoring leading zeros in fraction part – Ios swift

I want to format the fraction part of double values with 5 digits by ignoring the leading zeros, for example:

0.123456 -> 0.12345

0.00001234567 -> 0.000012345

0.0001234567 -> 0.00012345

how can I do that?

I tried to set the maximum and minimum fraction digits with the number formatter but it didn’t give me the result I wanted.

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2

Answers


  1. 0

    You could try to do that with a regular expression:

    ^d+.(0*)d{1,5}

    Result:

    0.00001234567 => 0.000012345
3.7 => 3.7
1.00523 => 1.00523
2.00287638723687263 => 2.0028763
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  2. 0

    You can use usesSignificantDigits with maximumSignificantDigits from NSNumberFormatter.

    https://developer.apple.com/documentation/foundation/nsnumberformatter/1417793-usessignificantdigits

    let nf = NSNumberFormatter()
nf.usesSignificantDigits = true
nf.maximumSignificantDigits = 5

    Should do the trick

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