我应该如何从字符串中删除所有前导空格?- 迅速
问题描述：
我需要一种方法来从作为空格的字符串中删除第一个字符.我正在寻找一种方法，甚至是 String 类型的扩展，我可以用它来剪切字符串的一个字符.
I need a way to remove the first character from a string which is a space. I am looking for a method or even an extension for the String type that I can use to cut out a character of a string.
答
要删除前导和尾随空格:
To remove leading and trailing whitespaces:
let trimmedString = string.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
斯威夫特 3/斯威夫特 4:
Swift 3 / Swift 4:
let trimmedString = string.trimmingCharacters(in: .whitespaces)