Dettagli
- Xcode 10.2.1 (10E1001), Swift 5
Soluzione
import Foundation
class CurrencyFormatter {
static var outputFormatter = CurrencyFormatter.create()
class func create(locale: Locale = Locale.current,
groupingSeparator: String? = nil,
decimalSeparator: String? = nil,
style: NumberFormatter.Style = NumberFormatter.Style.currency) -> NumberFormatter {
let outputFormatter = NumberFormatter()
outputFormatter.locale = locale
outputFormatter.decimalSeparator = decimalSeparator ?? locale.decimalSeparator
outputFormatter.groupingSeparator = groupingSeparator ?? locale.groupingSeparator
outputFormatter.numberStyle = style
return outputFormatter
}
}
extension Numeric {
func toCurrency(formatter: NumberFormatter = CurrencyFormatter.outputFormatter) -> String? {
guard let num = self as? NSNumber else { return nil }
var formatedSting = formatter.string(from: num)
guard let locale = formatter.locale else { return formatedSting }
if let separator = formatter.groupingSeparator, let localeValue = locale.groupingSeparator {
formatedSting = formatedSting?.replacingOccurrences(of: localeValue, with: separator)
}
if let separator = formatter.decimalSeparator, let localeValue = locale.decimalSeparator {
formatedSting = formatedSting?.replacingOccurrences(of: localeValue, with: separator)
}
return formatedSting
}
}
Utilizzo
let price = 12423.42
print(price.toCurrency() ?? "")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(style: .currencyISOCode)
print(price.toCurrency() ?? "nil")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(locale: Locale(identifier: "es_ES"))
print(price.toCurrency() ?? "nil")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(locale: Locale(identifier: "de_DE"), groupingSeparator: " ", style: .currencyISOCode)
print(price.toCurrency() ?? "nil")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(groupingSeparator: "_", decimalSeparator: ".", style: .currencyPlural)
print(price.toCurrency() ?? "nil")
let formatter = CurrencyFormatter.create(locale: Locale(identifier: "de_DE"), groupingSeparator: " ", decimalSeparator: ",", style: .currencyPlural)
print(price.toCurrency(formatter: formatter) ?? "nil")
Risultati
$12,423.42
USD12,423.42
12.423,42 €
12 423,42 EUR
12_423.42 US dollars
12 423,42 Euro