Remove all but numbers from NSString(从 NSString 中删除除数字之外的所有数字)
问题描述
我有一个带有括号和连字符的 NSString(电话号码),因为某些电话号码已被格式化.如何从字符串中删除除数字以外的所有字符?
I have an NSString (phone number) with some parenthesis and hyphens as some phone numbers are formatted. How would I remove all characters except numbers from the string?
推荐答案
老问题,但是怎么样:
NSString *newString = [[origString componentsSeparatedByCharactersInSet:
[[NSCharacterSet decimalDigitCharacterSet] invertedSet]]
componentsJoinedByString:@""];
它将源字符串分解为一组非数字,然后使用空字符串分隔符重新组合它们.不如挑选字符高效,但代码更紧凑.
It explodes the source string on the set of non-digits, then reassembles them using an empty string separator. Not as efficient as picking through characters, but much more compact in code.
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