__block BOOL isMatch = NO;
    NSString *letters = @"(  ????????  )?(?﹏?)??(•?? ? ??•??)?_(___°π°œ)_「」°?|_|_=3( ´???` )*/ω＼*)£";
    [letters enumerateSubstringsInRange:NSMakeRange(0, [letters length])
                                options:(NSStringEnumerationByComposedCharacterSequences)
                             usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
        if ([string containsString:substring]) {
            NSLog(@"match character:%@",substring);
            isMatch = YES;
            *stop = YES;
        }
    }];
    
    if (!isMatch) {
        NSString *pattern = @"[`~!@#$^&*()=|{}‘:;‘,\\[\\].<>/?~！@#￥……&*（）——|{}【】‘；：”“‘。，、？]+";
        NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
        isMatch = [pred evaluateWithObject:string];
    }
    NSLog(@"%@ is SpecialCharacters:%d",string,isMatch);