从 NSString 中去除非字母数字字符 [英] Strip Non-Alphanumeric Characters from an NSString

问题描述

我正在寻找一种快速简便的方法来从 NSString 中去除非字母数字字符.可能是使用 NSCharacterSet 的东西，但我很累，似乎没有任何东西返回只包含字符串中字母数字字符的字符串.

I'm looking for a quick and easy way to strip non-alphanumeric characters from an NSString. Probably something using an NSCharacterSet, but I'm tired and nothing seems to return a string containing only the alphanumeric characters in a string.

推荐答案

我们可以通过拆分然后加入来实现.组件SeparatedByCharactersInSet 需要 OS X 10.5+:

We can do this by splitting and then joining. Requires OS X 10.5+ for the componentsSeparatedByCharactersInSet:

NSCharacterSet *charactersToRemove = [[NSCharacterSet alphanumericCharacterSet] invertedSet];
NSString *strippedReplacement = [[someString componentsSeparatedByCharactersInSet:charactersToRemove] componentsJoinedByString:@""];

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