从[NSCharacterSet letterCharacterSet] invertedSet]手动排除一些符号

Question

以下代码将删除myString中的所有符号。是否有一种最简单的方法可以使某些独占符号（比如'）被删除而仍能使用此代码？

myString = [[myString componentsSeparatedByCharactersInSet:[[NSCharacterSet letterCharacterSet] invertedSet]] componentsJoinedByString:@""];

Answer 1

您需要创建一个可变副本，然后使用NSMutableCharacterSet进行更改。

NSMutableCharacterSet *mcs = [[[NSCharacterSet letterCharacterSet] invertedSet] mutableCopy];
[mcs removeCharactersInString:@"<characters you want excluded>"];

myString = [[myString componentsSeparatedByCharactersInSet:mcs] componentsJoinedByString:@""];

[mcs release];