正则表达式iphone

Question

如何使用regularexpressions chceck在iPhone上字符串仅包含此字符：a-zA-Z数字0-9或特殊字符：!@#$%^&*()_+-={}[]:"|;'\<>?,./

Answer 1

NSCharacterSet *charactersToRemove = [[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890 "] invertedSet];
NSString *stringValueOfTextField = [[searchBar.text componentsSeparatedByCharactersInSet:charactersToRemove] 
                                    componentsJoinedByString:@""];

试试这个::::

Answer 2

为此，您可以使用标准班级NSRegularExpression

Answer 3

NSRegularExpression *regex = [NSRegularExpression 
       regularExpressionWithPattern:@"\w[!@#$%^&*()_+-={}\[\]:\"|;'\<>?,./]"
                            options:NSRegularExpressionCaseInsensitive
                              error:&error];

NSUInteger numberOfMatches = [regex numberOfMatchesInString:string
                                                     options:0
                                                       range:NSMakeRange(0, [string length])];

请注意，NSRegularExpression仅适用于iOS 4及更高版本。