删除NSString中的特殊字符

Question

我将段落转换为包含许多特殊字符的单词

"  , "  . `

如何在nsstring中删除此字符并在nsstring中只获取字母

前"新"到新的 //the special characters are change

Answer 1

NSString *unfilteredString = @"!@#$%^&*()_+|abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
NSCharacterSet *notAllowedChars = [[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"] invertedSet];
NSString *resultString = [[unfilteredString componentsSeparatedByCharactersInSet:notAllowedChars] componentsJoinedByString:@""];
NSLog (@"Result: %@", resultString);

尝试这可能有助于你

Answer 2

有很多方法可以解决这个问题.例如,这是使用正则表达式的解决方案.这只是一个例子.我们不知道您要删除的所有特殊字符.

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        NSRegularExpression *expression = [NSRegularExpression regularExpressionWithPattern:@"[,\\.`\"]"
                                                                                    options:0
                                                                                      error:NULL];
        NSString *sampleString = @"The \"new\" quick brown fox, who jumped over the lazy dog.";
        NSString *cleanedString = [expression stringByReplacingMatchesInString:sampleString
                                                                       options:0
                                                                         range:NSMakeRange(0, sampleString.length)
                                                                  withTemplate:@""];
        printf("cleaned = %s",[cleanedString UTF8String] );

    }
    return 0;
}