Adding Thousand Separator to Int in Swift
IosSwiftSeparatorIos Problem Overview
I am fairly new to Swift and having a great deal of trouble finding a way to add a space as a thousand separator.
What I am hoping to achieve is taking the result of a calculation and displaying it in a textfield so that the format is:
> 2 358 000
instead of
> 2358000
for example.
I am not sure if I should be formatting the Int value and then converting it to a String, or adding the space after the Int value is converted to a String. Any help would be greatly appreciated.
Ios Solutions
Solution 1 - Ios
You can use NSNumberFormatter to specify a different grouping separator as follow:
update: Xcode 11.5 • Swift 5.2
extension Formatter {
static let withSeparator: NumberFormatter = {
let formatter = NumberFormatter()
formatter.numberStyle = .decimal
formatter.groupingSeparator = " "
return formatter
}()
}
extension Numeric {
var formattedWithSeparator: String { Formatter.withSeparator.string(for: self) ?? "" }
}
2358000.formattedWithSeparator // "2 358 000"
2358000.99.formattedWithSeparator // "2 358 000.99"
let int = 2358000
let intFormatted = int.formattedWithSeparator // "2 358 000"
let decimal: Decimal = 2358000
let decimalFormatted = decimal.formattedWithSeparator // "2 358 000"
let decimalWithFractionalDigits: Decimal = 2358000.99
let decimalWithFractionalDigitsFormatted = decimalWithFractionalDigits.formattedWithSeparator // "2 358 000.99"
If you need to display your value as currency with current locale or with a fixed locale:
extension Formatter {
static let number = NumberFormatter()
}
extension Locale {
static let englishUS: Locale = .init(identifier: "en_US")
static let frenchFR: Locale = .init(identifier: "fr_FR")
static let portugueseBR: Locale = .init(identifier: "pt_BR")
// ... and so on
}
extension Numeric {
func formatted(with groupingSeparator: String? = nil, style: NumberFormatter.Style, locale: Locale = .current) -> String {
Formatter.number.locale = locale
Formatter.number.numberStyle = style
if let groupingSeparator = groupingSeparator {
Formatter.number.groupingSeparator = groupingSeparator
}
return Formatter.number.string(for: self) ?? ""
}
// Localized
var currency: String { formatted(style: .currency) }
// Fixed locales
var currencyUS: String { formatted(style: .currency, locale: .englishUS) }
var currencyFR: String { formatted(style: .currency, locale: .frenchFR) }
var currencyBR: String { formatted(style: .currency, locale: .portugueseBR) }
// ... and so on
var calculator: String { formatted(groupingSeparator: " ", style: .decimal) }
}
Usage:
1234.99.currency // "$1,234.99"
1234.99.currencyUS // "$1,234.99"
1234.99.currencyFR // "1 234,99 €"
1234.99.currencyBR // "R$ 1.234,99"
1234.99.calculator // "1 234.99"
Note: If you would like to have a space with the same width of a period you can use "\u{2008}"
formatter.groupingSeparator = "\u{2008}"
Solution 2 - Ios
You want to use NSNumberFormatter
:
let fmt = NSNumberFormatter()
fmt.numberStyle = .DecimalStyle
fmt.stringFromNumber(2358000) // with my locale, "2,358,000"
fmt.locale = NSLocale(localeIdentifier: "fr_FR")
fmt.stringFromNumber(2358000) // "2 358 000"
Solution 3 - Ios
With Swift 5, when you need to format the display of numbers, NumberFormatter
is the right tool.
NumberFormatter
has a property called numberStyle
. numberStyle
can be set to a value of NumberFormatter.Style.decimal
in order to set the formatter's style to decimal.
Therefore, in the simplest case when you want to format a number with decimal style, you can use the following Playground code:
import Foundation
let formatter = NumberFormatter()
formatter.numberStyle = NumberFormatter.Style.decimal
let amount = 2358000
let formattedString = formatter.string(for: amount)
print(String(describing: formattedString))
According to the user's current locale, this code will print Optional("2,358,000")
for en_US or Optional("2 358 000")
for fr_FR.
Note that the following code snippet that uses the NumberFormatter
's locale
property set to Locale.current
is equivalent to the previous Playground code:
import Foundation
let formatter = NumberFormatter()
formatter.numberStyle = .decimal
formatter.locale = Locale.current
let amount = 2358000
let formattedString = formatter.string(for: amount)
print(String(describing: formattedString))
The Playground code below that uses the NumberFormatter
's groupingSeparator
property set to Locale.current.groupingSeparator
is also equivalent to the former:
import Foundation
let formatter = NumberFormatter()
formatter.numberStyle = .decimal
formatter.groupingSeparator = Locale.current.groupingSeparator
let amount = 2358000
let formattedString = formatter.string(for: amount)
print(String(describing: formattedString))
Otherwise, if you want to set the number formatting with a specific locale formatting style, you may use the following Playground code:
import Foundation
let formatter = NumberFormatter()
formatter.numberStyle = .decimal
formatter.locale = Locale(identifier: "fr_FR")
let amount = 2358000
let formattedString = formatter.string(for: amount)
print(String(describing: formattedString))
// prints: Optional("2 358 000")
However, if what you really want is to enforce a specific grouping separator, you may use the Playground code below:
import Foundation
let formatter = NumberFormatter()
formatter.numberStyle = .decimal
formatter.groupingSeparator = " "
let amount = 2358000
let formattedString = formatter.string(for: amount)
print(String(describing: formattedString))
// prints: Optional("2 358 000")
Solution 4 - Ios
Leo Dabus's answer translated to Swift 3:
Into any .swift
file, out of a class:
struct Number {
static let withSeparator: NumberFormatter = {
let formatter = NumberFormatter()
formatter.groupingSeparator = " " // or possibly "." / ","
formatter.numberStyle = .decimal
return formatter
}()
}
extension Integer {
var stringWithSepator: String {
return Number.withSeparator.string(from: NSNumber(value: hashValue)) ?? ""
}
}
Usage:
let myInteger = 2358000
let myString = myInteger.stringWithSeparator // "2 358 000"
Solution 5 - Ios
Code:
//5000000
let formatter = NumberFormatter()
formatter.groupingSeparator = " "
formatter.locale = Locale(identifier: "en_US")
formatter.numberStyle = .decimal.
Output: > 5 000 000
Solution 6 - Ios
I was looking for a currency format like $100,000.00 I accomplished it customizing the implementation Leo Dabus like this
extension Formatter {
static let withSeparator: NumberFormatter = {
let formatter = NumberFormatter()
formatter.numberStyle = .currency
formatter.currencyGroupingSeparator = ","
formatter.locale = Locale(identifier: "en_US") //for USA's currency patter
return formatter
}()
}
extension Numeric {
var formattedWithSeparator: String {
return Formatter.withSeparator.string(for: self) ?? ""
}
}
Solution 7 - Ios
Try this
func addPoints(inputNumber: NSMutableString){
var count: Int = inputNumber.length
while count >= 4 {
count = count - 3
inputNumber.insert(" ", at: count) // you also can use ","
}
print(inputNumber)
}
The call:
addPoints(inputNumber: "123456")
The result: >123 456 (or 123,456)