CODEWITHSUNDEEP
iosobjective-cswift
Gabriel Garrett
Gabriel Garrett

Reputation: 2127

How to set iOS NSNumberFormatter locale via currency code?

Is there a way to set the NSLocale for a NSNumberFormatter via the currency code instead of the locale identifier in iOS?

Like, for instance, to use "USD" instead of "en_US" in any point of the locale setting?

I see there's a NSLocaleCurrencyCode object, but I'm not sure what method I can use from it to set the NSNumberFormatter's locale.

I'm currently using Swift, if that makes the process any easier.

EDIT: For further explanation of what I'm doing, I have a list of every single country's currency code (USD, GBP, JPY, CNY, etc...). The user picks whichever currency he's using via these codes, and then I want the NSNumberFormatter to automatically set its locale to the locale of that currency to automatically format it.

Upvotes: 1

Views: 2830

Answers (1)

rintaro
rintaro

Reputation: 51911

You cannot determine a specific locale from currency code.

For example, the number of locales which have currency code USD is 27, and NSNumberFormatter with these NSLocale emits formatted string with 7 variations:

"$123,456.78":    [en_PR, es_US, en_MH, chr_US, en_AS, en_MP, es_SV, en_VG, en_VI, es_PR, haw_US, en_IO, en_UM, en_US, en_DG, en_GU]
"US$123,456.78":  [en_PW, sn_ZW, en_ZW, en_TC, nd_ZW, en_FM]
"$123.456,78":    [es_EC]
"123 456,78 US$": [pt_TL]
"$ 123456.78":    [en_US_POSIX]
"$ 123.456,78":   [nl_BQ]
"$ 123,456.78":   [lkt_US]

If you want do what you want, you should maintain a lookup table by yourself.

let currency2locale = [
    "USD": NSLocale(localeIdentifier: "en_US"),
    "GBP": NSLocale(localeIdentifier: "en_GB"),
    "JPY": NSLocale(localeIdentifier: "ja_JP"),
    ...
]

Upvotes: 6

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