如何排除“+”在 NSRegularExpression 中被视为特殊字符？

Question

我有以下 userName：iphone6s_taylor 和 iphone6+_taylor。

为了在我按照正则表达式创建的文本中找到它们：

let regex = "\B@\(userName)\b"

但在以下文字中：

let text = "@iphone6s_taylor @iphone6+_taylor @iphone6+_taylor"

只找到第一个。如何更改正则表达式以找到它们中的每一个？

Answer 1

您可以使用 escapedPatternForString:

Returns a string by adding backslash escapes as necessary to the given string, to escape any characters that would otherwise be treated as pattern metacharacters.

您的场景的示例用法：

let userName = NSRegularExpression.escapedPatternForString("iphone6+_taylor")

如何排除“+”在 NSRegularExpression 中被视为特殊字符？

How to exclude "+" from being treated as special character in NSRegularExpression?

ios

regex

swift

nsregularexpression