Formatting Numbers in Swift 3

Question

I want to format number to this: 123.234.234.234 from 123234234234 depends on what the user types into the text field. I don't want to manage currency, it's not about currency, it is about the user has to type in a number and this number should be formatted correctly to be easier to read.

Not with a comma, with a dot.

I found only currency stuff in the whole research

Answer 1

There's actually much easier solution (there is no need to create NumberFormatter instance) and it takes into account the user's language:

let result = String(format: "%ld %@", locale: Locale.current, viewCount, "views")

Result for value 1000000 with English:

1,000,000

Russian:

1 000 000

p.s. in Android it's exactly the same String.format(Locale.getDefault(), "%,d %s", viewCount, "views")

Answer 2

swift 4

extension Int {
    func formatnumber() -> String {
        let formater = NumberFormatter()
        formater.groupingSeparator = "."
        formater.numberStyle = .decimal
        return formater.string(from: NSNumber(value: self))!
    }
}

Answer 3

For leading zeros (Swift 5.2)

String(format: "%02d", intNumber) // 6 -> "06"
String(format: "%03d", intNumber) // 66 -> "066"
String(format: "%04d", intNumber) // 666 -> "0666"

from: https://stackoverflow.com/a/25566860/1064316