在swit4中使用一个带当前格式化程序的负数

I have a currency format func that looks like this:

我有一种货币格式func，看起来是这样的:

func currencyFormat() -> NumberFormatter{
    let currencyFormatter = NumberFormatter()
    currencyFormatter.usesGroupingSeparator = true
    currencyFormatter.numberStyle = NumberFormatter.Style.currency
    // localize to your grouping and decimal separator
    currencyFormatter.locale = NSLocale.current
    return currencyFormatter
}

So when I use it like this:

当我这样使用它时

currencyFormat().string(for: 20.34)   --> $20.34

Same goes if I send over a negative value

同样的，如果我传递一个负值。

currencyFormat().string(for: -20.34)  -->  -$20.34

I don't want the negative sign to come back formatted with the currency

我不想让负面的信号被用货币格式化。

It works great but the issue I'm having is if I send it a negative decimal number, I get back the negative sign. Is there a way to drop that sign? Should I convert the decimal to positive before I send it over to the converter?

它很好，但是我的问题是如果我给它发送一个负数，我就会得到负号。有没有办法去掉这个符号?我要把小数点转换成正数再把它传送给转换器吗?

1 个解决方案

#1

Ensure the number is positive before sending it through the currency formatter by taking the absolute value:

在以绝对值发送货币格式化程序之前，确保数字为正数:

let number = -500
let positiveNumber = abs(number)

let formattedNumber = currencyFormat().string(for: positiveNumber)

This is the simplest and most readable way to do it.

这是最简单也是最可读的方法。

#1