Swift仅从字符串中删除尾随空格 [英] Swift remove ONLY trailing spaces from string

问题描述

SO 中的许多示例都固定两侧，前导和尾随.我的要求只是关于尾随.我的输入文本是:保持我的左侧"所需的输出:保持我的左侧"

many examples in SO are fixing both sides, the leading and trailing. My request is only about the trailing. My input text is: " keep my left side " Desired output: " keep my left side"

当然这个命令会去除两端:

Of course this command will remove both ends:

let cleansed = messageText.trimmingCharacters(in: .whitespacesAndNewlines)

这对我不起作用.

我该怎么做?

推荐答案

一个相当简单的解决方案是正则表达式，模式是一个或多个(+)空白字符(\s) 在字符串的末尾($)

A quite simple solution is regular expression, the pattern is one or more(+) whitespace characters(\s) at the end of the string($)

let string = " keep my left side "
let cleansed = string.replacingOccurrences(of: "\\s+$", 
                                         with: "", 
                                      options: .regularExpression)

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