如何在swift中为数字添加逗号? [英] how to add commas to a number in swift?
本文介绍了如何在swift中为数字添加逗号?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何将逗号添加到我从 JSON 中快速检索的数字中.
How would I add commas to a number that I'm retrieving from a JSON in swift.
Example
31908551587 to
31,908,551,587
我很困惑,我不知道该怎么办.
I'm so confused and I have no idea what to do.
推荐答案
你可以用 NSNumberFormatter
Swift 4
let largeNumber = 31908551587
let numberFormatter = NumberFormatter()
numberFormatter.numberStyle = .decimal
let formattedNumber = numberFormatter.string(from: NSNumber(value:largeNumber))
Swift 3
let largeNumber = 31908551587
let numberFormatter = NumberFormatter()
numberFormatter.numberStyle = NumberFormatter.Style.decimal
let formattedNumber = numberFormatter.string(from: NSNumber(value:largeNumber))
Swift 2
let largeNumber = 31908551587
let numberFormatter = NSNumberFormatter()
numberFormatter.numberStyle = NSNumberFormatterStyle.DecimalStyle
let formattedNumber = numberFormatter.stringFromNumber(largeNumber)
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