我创建一个预算应用程序，允许用户输入自己的预算以及交易。我需要让用户从单独的文本字段中输入两个便士和英镑，他们需要与货币符号一起格式化。我目前所面对的这个工作正常，但要使其本地化作为目前只英镑的作品。我一直在努力隐蔽NSNumberFormatter实例从目标C斯威夫特。
我的第一个问题是，我需要设置的占位符输入字段是特定于用户位置的事实。例如。英镑和便士，美元和美分等..
第二个问题是，在每个文本字段如10216和32的输入的值需要被格式化，并需要添加特定于用户位置的货币符号。因此，这将成为£10,216.32或$ 10,216.32等...
另外，我需要在计算中使用的格式化数字的结果。所以，我怎么能做到这一点，而不会在问题没有运行与货币符号的问题？
任何帮助将非常感激。
下面是关于如何使用它斯威夫特3.一个例子（编辑：工作在斯威夫特4太）
let price = 123.436 as NSNumber
let formatter = NumberFormatter()
formatter.numberStyle = .currency
// formatter.locale = NSLocale.currentLocale() // This is the default
// In Swift 4, this ^ has been renamed to simply NSLocale.current
formatter.string(from: price) // "$123.44"
formatter.locale = Locale(identifier: "es_CL")
formatter.string(from: price) // $123"
formatter.locale = Locale(identifier: "es_ES")
formatter.string(from: price) // "123,44 €"
下面是关于如何使用它斯威夫特2老例子。
let price = 123.436
let formatter = NSNumberFormatter()
formatter.numberStyle = .CurrencyStyle
// formatter.locale = NSLocale.currentLocale() // This is the default
formatter.stringFromNumber(price) // "$123.44"
formatter.locale = NSLocale(localeIdentifier: "es_CL")
formatter.stringFromNumber(price) // $123"
formatter.locale = NSLocale(localeIdentifier: "es_ES")
formatter.stringFromNumber(price) // "123,44 €"
extension Float {
var convertAsLocaleCurrency :String {
var formatter = NumberFormatter()
formatter.numberStyle = .currency
formatter.locale = Locale.current
return formatter.string(from: self as NSNumber)!
}
}
这工作迅速的Xcode 3.1 8.2.1
斯威夫特3：
如果你正在寻找一个解决方案，为您提供：
请使用以下命令：
func cleanDollars(_ value: String?) -> String {
guard value != nil else { return "$0.00" }
let doubleValue = Double(value!) ?? 0.0
let formatter = NumberFormatter()
formatter.currencyCode = "USD"
formatter.currencySymbol = "$"
formatter.minimumFractionDigits = (value!.contains(".00")) ? 0 : 2
formatter.maximumFractionDigits = 2
formatter.numberStyle = .currencyAccounting
return formatter.string(from: NSNumber(value: doubleValue)) ?? "$\(doubleValue)"
}
我已经实现了由@NiñoScript提供的解决方案的扩展，以及：
延期
// Create a string with currency formatting based on the device locale
//
extension Float {
var asLocaleCurrency:String {
var formatter = NSNumberFormatter()
formatter.numberStyle = .CurrencyStyle
formatter.locale = NSLocale.currentLocale()
return formatter.stringFromNumber(self)!
}
}
用法：
let amount = 100.07
let amountString = amount.asLocaleCurrency
print(amount.asLocaleCurrency())
// prints: "$100.07"
斯威夫特3
extension Float {
var asLocaleCurrency:String {
var formatter = NumberFormatter()
formatter.numberStyle = .currency
formatter.locale = Locale.current
return formatter.string(from: self)!
}
}
Xcode的9•斯威夫特4
extension Locale {
static let br = Locale(identifier: "pt_BR")
static let us = Locale(identifier: "en_US")
static let uk = Locale(identifier: "en_UK")
}
extension NumberFormatter {
convenience init(style: Style, locale: Locale = .current) {
self.init()
self.locale = locale
numberStyle = style
}
}
extension Formatter {
static let currency = NumberFormatter(style: .currency)
static let currencyUS = NumberFormatter(style: .currency, locale: .us)
static let currencyBR = NumberFormatter(style: .currency, locale: .br)
}
extension Numeric { // for Swift 3 use FloatingPoint or Int
var currency: String {
return Formatter.currency.string(for: self) ?? ""
}
var currencyUS: String {
return Formatter.currencyUS.string(for: self) ?? ""
}
var currencyBR: String {
return Formatter.currencyBR.string(for: self) ?? ""
}
}
let price = 1.99
print(Formatter.currency.locale) // "en_US (current)\n"
print(price.currency) // "$1.99\n"
Formatter.currency.locale = .br
print(price.currency) // "R$1,99\n"
Formatter.currency.locale = .uk
print(price.currency) // "£1.99\n"
print(price.currencyBR) // "R$1,99\n"
print(price.currencyUS) // "$1.99\n"
import Foundation
class CurrencyFormatter {
static var outputFormatter = CurrencyFormatter.create()
class func create(locale: Locale = Locale.current,
groupingSeparator: String? = nil,
decimalSeparator: String? = nil,
style: NumberFormatter.Style = NumberFormatter.Style.currency) -> NumberFormatter {
let outputFormatter = NumberFormatter()
outputFormatter.locale = locale
outputFormatter.decimalSeparator = decimalSeparator ?? locale.decimalSeparator
outputFormatter.groupingSeparator = groupingSeparator ?? locale.groupingSeparator
outputFormatter.numberStyle = style
return outputFormatter
}
}
extension Numeric {
func toCurrency(formatter: NumberFormatter = CurrencyFormatter.outputFormatter) -> String? {
guard let num = self as? NSNumber else { return nil }
var formatedSting = formatter.string(from: num)
guard let locale = formatter.locale else { return formatedSting }
if let separator = formatter.groupingSeparator, let localeValue = locale.groupingSeparator {
formatedSting = formatedSting?.replacingOccurrences(of: localeValue, with: separator)
}
if let separator = formatter.decimalSeparator, let localeValue = locale.decimalSeparator {
formatedSting = formatedSting?.replacingOccurrences(of: localeValue, with: separator)
}
return formatedSting
}
}
let price = 12423.42
print(price.toCurrency() ?? "")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(style: .currencyISOCode)
print(price.toCurrency() ?? "nil")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(locale: Locale(identifier: "es_ES"))
print(price.toCurrency() ?? "nil")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(locale: Locale(identifier: "de_DE"), groupingSeparator: " ", style: .currencyISOCode)
print(price.toCurrency() ?? "nil")
CurrencyFormatter.outputFormatter = CurrencyFormatter.create(groupingSeparator: "_", decimalSeparator: ".", style: .currencyPlural)
print(price.toCurrency() ?? "nil")
let formatter = CurrencyFormatter.create(locale: Locale(identifier: "de_DE"), groupingSeparator: " ", decimalSeparator: ",", style: .currencyPlural)
print(price.toCurrency(formatter: formatter) ?? "nil")
$12,423.42
USD12,423.42
12.423,42 €
12 423,42 EUR
12_423.42 US dollars
12 423,42 Euro
更新了雨燕4从@迈克尔Voccola的回答：
extension Double {
var asLocaleCurrency: String {
let formatter = NumberFormatter()
formatter.numberStyle = .currency
formatter.locale = Locale.current
let formattedString = formatter.string(from: self as NSNumber)
return formattedString ?? ""
}
}
注：没有强制解开，力解开都是邪恶的。
斯威夫特4文本字段实现
var value = 0
currencyTextField.delegate = self
func numberFormatting(money: Int) -> String {
let formatter = NumberFormatter()
formatter.numberStyle = .currency
formatter.locale = .current
return formatter.string(from: money as NSNumber)!
}
currencyTextField.text = formatter.string(from: 50 as NSNumber)!
func textFieldDidEndEditing(_ textField: UITextField) {
value = textField.text
textField.text = numberFormatting(money: Int(textField.text!) ?? 0 as! Int)
}
func textFieldDidBeginEditing(_ textField: UITextField) {
textField.text = value
}
斯威夫特4
formatter.locale = Locale.current
如果你想改变的语言环境，你可以做这样的
formatter.locale = Locale.init(identifier: "id-ID")
//这是印尼的语言环境的语言环境。如果你想为每个手机使用面积使用它作为每上提Locale.current
//MARK:- Complete code
let formatter = NumberFormatter()
formatter.numberStyle = .currency
if let formattedTipAmount = formatter.string(from: Int(newString)! as
NSNumber) {
yourtextfield.text = formattedTipAmount
}
添加此功能
func addSeparateMarkForNumber(int: Int) -> String {
var string = ""
let formatter = NumberFormatter()
formatter.locale = Locale.current
formatter.numberStyle = .decimal
if let formattedTipAmount = formatter.string(from: int as NSNumber) {
string = formattedTipAmount
}
return string
}
使用：
let giaTri = value as! Int
myGuessTotalCorrect = addSeparateMarkForNumber(int: giaTri)