在带有SDK Paypal的Swift 3中键入NSDecimalNumber

Question

When I am creating the item to send to paypal I do the following

let ammountRequest: String = txtAmmount.text!
let item = PayPalItem(name: "shop things", withQuantity: 1, withPrice: NSDecimalNumber(string: ammountRequest), withCurrency: "EUR", withSku: "Create Balance")

let items = [item]
let subtotal = PayPalItem.totalPrice(forItems: items)

If the "ammountRequest" equals 11.12 for example, on the page to pay will appear the 11 instead of the 11.12 as Can I do to appear the decimal places since they are being removed?

Answer 1

You are probably not dealing well with localization. NSDecimalNumber(string: ammountRequest) is trying to parse the string using the current locale. Therefore you have to be sure that the string contains , (comma) or . (point) as the decimal separator depending on the current locale.

The discussion in the documentation describes the accepted values depending on locale.

One way to deal with this is to replace all possible decimal separators ( . and , ) with . and then use English locale (ideally the POSIX locale):

let amountString = "11.12"
let normalizedAmountString = amountString.replacingOccurrences(of: "[,.]", with: ".", options: .regularExpression)

let posixLocale = Locale(identifier: "en_US_POSIX")

let amount = NSDecimalNumber(string: normalizedAmountString, locale: posixLocale)
print(amount)

Note that most of the times NSDecimalNumber can deal with both . and , . The problems appear when . or , is a grouping separator in the current locale.

PS: You should use Decimal instead of NSDecimalNumber in Swift code.