swift - 货币格式不起作用

Question

我刚刚更新到 Xcode 6 的 GM，目前正在处理并修复问题。

我的代码的特定部分存在问题，我一直在努力修复。基本上我曾经有这样的代码:

override func viewDidLoad() {
    currencyFormatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
    currencyFormatter.currencyCode = NSLocale.currentLocale().displayNameForKey(NSLocaleCurrencySymbol, value: NSLocaleCurrencyCode)!
}

func textFieldDidChangeValue(textField: UITextField) {
    //Automatic formatting for transaction value text field. Target is added above.
    var text = textField.text.stringByReplacingOccurrencesOfString(currencyFormatter.currencySymbol, withString: "").stringByReplacingOccurrencesOfString(currencyFormatter.groupingSeparator, withString: "").stringByReplacingOccurrencesOfString(currencyFormatter.decimalSeparator, withString: "").stringByReplacingOccurrencesOfString(" ", withString: "") // There is a special character here. This line is critical for european/other currencies.
    println(textField.text)

    textField.text = currencyFormatter.stringFromNumber((text as NSString).doubleValue / 100.0)
    currencyDouble = (text as NSString).doubleValue / 100.0
    //println(currencyDouble)
    valueEnter.alpha = 100
}

当我的应用程序崩溃时，我不得不将 viewDidLoad() 中的代码更改为:

let currencyFormatter = NSNumberFormatter()
    currencyFormatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
    if let currencyCode = NSLocale.currentLocale().objectForKey(NSLocaleCurrencySymbol) as? String {
        currencyFormatter.currencyCode = currencyCode
        println(currencyFormatter.currencyCode) //Will display "$", for example, if your locale is set to USD
    }

应用程序不再崩溃，但格式不起作用。我尝试了一些方法，但无法弄清楚如何解决它。

Answer 1

您正在使用 NSLocaleCurrencySymbol 值设置 currencyCode。顾名思义，这是错误的值。正确的值是 NSLocaleCurrencyCode。