Swift playground - How to convert a string with comma to a string with decimal
You can use for this Swift 3:
let currentAmount = "2,50"
currentAmount = currentAmount.replacingOccurrences(of: ",", with: ".")
print(currentAmount) // "2.50\n"
update: Xcode 8.2.1 • Swift 3.0.2 You can use NumberFormatter() to convert your string to number. You just need to specify the decimalSeparator as follow:
extension String {
static let numberFormatter = NumberFormatter()
var doubleValue: Double {
String.numberFormatter.decimalSeparator = "."
if let result = String.numberFormatter.number(from: self) {
return result.doubleValue
} else {
String.numberFormatter.decimalSeparator = ","
if let result = String.numberFormatter.number(from: self) {
return result.doubleValue
}
}
return 0
}
}
"2.25".doubleValue // 2.25
"2,25".doubleValue // 2.25
let price = "2,25"
let costString = String(format:"%.2f", price.doubleValue) // "2.25"
You should do the currency formatting also with NumberFormat, so create a read-only computed property currency extending FloatingPoint protocol to return a formatted string from the String doubleValue property.
extension NumberFormatter {
convenience init(style: Style) {
self.init()
self.numberStyle = style
}
}
extension Formatter {
static let currency = NumberFormatter(style: .currency)
}
extension FloatingPoint {
var currency: String {
return Formatter.currency.string(for: self) ?? ""
}
}
let costString = "2,25".doubleValue.currency // "$2.25"
Formatter.currency.locale = Locale(identifier: "en_US")
"2222.25".doubleValue.currency // "$2,222.25"
"2222,25".doubleValue.currency // "$2,222.25"
Formatter.currency.locale = Locale(identifier: "pt_BR")
"2222.25".doubleValue.currency // "R$2.222,25"
"2222,25".doubleValue.currency // "R$2.222,25"