迅捷2将int转换为numberFromString作为字符串

Question

I am new in swift and I want to write the number with commas

NSNumberFormatter().numberFromString("123456789")) as! String

I have error Cannot convert value of type 'Int' to expected argument type 'String'. Any help please

Answer 1

Try this one.

let myNumber = 123456789
var numberFormatter = NSNumberFormatter()
numberFormatter.numberStyle = NSNumberFormatterStyle.DecimalStyle
numberFormatter.stringFromNumber(myNumber)!

Answer 2

You can set the number of fractions with:

let numberToConvert: Int = 123456789
let numberFormatter = NSNumberFormatter()
numberFormatter.minimumFractionDigits = 2

let convertedNumber = numberFormatter.stringFromNumber(numberToConvert)

prints

"123456789.00"

If you want something like "123,456,789" then add following line after minimumFactionDigits

numberFormatter.numberStyle = NSNumberFormatterStyle.DecimalStyle

Answer 3

var string= "7890"
var number = Int(string)

Answer 4

If u don't need to specify number of decimal places:

 var number: CGFloat = 98888.5555
 var string = "\(number)"