SWIFT中格式化数字比较常用的应该就是以下几种格式了。

?
1
2
3
4
5
var formatter = NSNumberFormatter()
//formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle //$72,900
formatter.numberStyle = NSNumberFormatterStyle.DecimalStyle //72,900
//formatter.numberStyle = NSNumberFormatterStyle.PercentStyle //90%
var str = formatter.stringFromNumber(number)!