NSNumberFormatter paddingPosition不起作用 [英] NSNumberFormatter paddingPosition doesn't work

问题描述

我有一个这样的格式化货币值。 $ 99.99 。我需要在货币符号和金额之间留一个空格，例如 $ 99.99 。从这个 answer 中我发现我需要为此使用填充。但是我正在尝试的方法不起作用。

I have a formatted currency value like this. $99.99. I need to have a space in between the currency symbol and the amount like so $ 99.99. From this answer I found that I need to use padding for this. However what I'm trying isn't working.

private var currencyFormatter: NSNumberFormatter = {
    let formatter = NSNumberFormatter()
    formatter.numberStyle = .CurrencyStyle
    formatter.paddingPosition = .AfterPrefix
    return formatter
}()

var price: Float = 99.99


let s = currencyFormatter.stringFromNumber(price)
print(s!) // I still get $99.99

也许我缺少了什么？

推荐答案

该填充显示出来，您需要为格式化程序提供宽度：

In order to have that padding show up you'll need to provide a width to the formatter:

let currencyFormatter: NumberFormatter = {
    let formatter = NumberFormatter()
    formatter.numberStyle = .currency
    formatter.paddingPosition = .afterPrefix

    // pad with a space, use a minimum of seven characters
    formatter.paddingCharacter = " "
    formatter.formatWidth = 7

    return formatter
}()

print(currencyFormatter.stringFromNumber(99.99)!)
// prints "$ 99.99"

或者，如果您始终只需要一个空格，则可以尝试修改货币符号：

Alternately, if you just always need a single space you can try modifying the currency symbol:

formatter.currencySymbol = "\(formatter.currencySymbol) "

这篇关于NSNumberFormatter paddingPosition不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！