将字符串分成空格

时间:2019-02-06 13:30:58

标签: swift string split

我尝试用空格将我的double转换为字符串。现在我的数字看起来像这样1234567.54,我需要获取像这样的字符串“ 1 234 567.54”,我该如何快速完成呢?

extension StringProtocol where Self: RangeReplaceableCollection {
    mutating func insert(separator: String, every n: Int) {
        indices.reversed().forEach {
            if $0 != startIndex { if distance(from: startIndex, to: $0) % n == 0 { insert(contentsOf: separator, at: $0) } }
        }
    }
    func inserting(separator: String, every n: Int) -> Self {
        var string = self
        string.insert(separator: separator, every: n)
        return string
    }
}

它可以工作,但是没有我需要的

1 个答案:

答案 0 :(得分:6)

您可以使用NumberFormatter

let formatter = NumberFormatter()
formatter.groupingSeparator = " "
formatter.numberStyle = .decimal
let formattedNumber = formatter.string(from: 1234567.89)

print(formattedNumber)
  

打印:1 234 567.89