在Swift中更改多种货币的分组分隔符,货币符号和货币符号的位置

Question

我的应用使用多种货币,这些货币使用不同的格式,例如:

卢布的价格显示为:1,101Руб.

美元的相同金额显示为:1 101美元

如何通过为不同货币定义一组不同的格式来更改分组分隔符,货币符号和货币符号的位置.

这就是我的短代码的立场

var formatter = NSNumberFormatter()
formatter.numberStyle = .CurrencyStyle
formatter.locale = NSLocale.currentLocale()
formatter.stringFromNumber(4500000)
//Output : $4,500,000.00
//Expected : 4,500,000 ???.

Answer 1

试试这样:

extension Formatter {
    static let belarusianRuble: NumberFormatter = {
        let formatter = NumberFormatter()
        // set the numberStyle to .CurrencyStyle
        formatter.numberStyle = .currency
        // set the desired negative and positive formats grouping, and currency symbol position
        formatter.positiveFormat = "#,##0 ¤"
        formatter.negativeFormat = "-#,##0 ¤"
        // set your custom currency symbol
        formatter.currencySymbol = "???"
        return formatter
    }()
}

作为扩展:

let stringToDisplay = Formatter.belarusianRuble.string(for: 4500000)  // "4,500,000 ???"

用法

extension Formatter {
    static let currencyBYR: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.numberStyle = .currency
        formatter.positiveFormat = "#,##0 ¤"
        formatter.negativeFormat = "-#,##0 ¤"
        formatter.currencySymbol = "???"
        return formatter
    }()
    static let currencyEUR: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.locale = Locale(identifier: "pt_PT")
        formatter.numberStyle = .currency
        return formatter
    }()
    static let currencyUSD: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.locale = Locale(identifier: "en_US")
        formatter.numberStyle = .currency
        return formatter
    }()
    static let currencyBRL: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.locale = Locale(identifier: "pt_BR")
        formatter.numberStyle = .currency
        return formatter
    }()
    static let currencyRUB: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.locale = Locale(identifier: "ru_RU")
        formatter.numberStyle = .currency
        formatter.maximumFractionDigits = 0
        return formatter
    }()
    static let currencyLocale: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.locale = .current
        formatter.numberStyle = .currency
        return formatter
    }()
}