- (BOOL)hyb_isValidPersonID {    return [NSStringhyb_isValidPersonID:self];  }     + (BOOL)hyb_isValidPersonID:(NSString *)personId {    // 判断位数    if (personId.length != 15 && personId.length != 18) {      return NO;    }    NSString *carid = personId;    long lSumQT = 0;    // 加权因子    int R[] ={7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };    // 校验码    unsigned char checkers[11]={'1','0','X', '9', '8', '7', '6', '5', '4', '3', '2'};        // 将15位身份证号转换成18位    NSMutableString *str = [NSMutableStringstringWithString:personId];    if (personId.length == 15) {      [strinsertString:@"19"atIndex:6];      long p = 0;      const char *personId = [strUTF8String];            for (int i = 0; i<= 16; i++) {        p += (personId[i] - 48) * R[i];      }            int o = p % 11;      NSString *string_content = [NSStringstringWithFormat:@"%c", checkers[o]];      [strinsertString:string_contentatIndex:[strlength]];      carid = str;    }        // 判断地区码    NSString * sProvince = [caridsubstringToIndex:2];    if (![self_areaCode:sProvince]) {      return NO;    }        // 判断年月日是否有效    // 年份    int strYear = [[self_substringWithString:caridbegin:6end:4]intValue];    // 月份    int strMonth = [[self_substringWithString:caridbegin:10end:2]intValue];    // 日    int strDay = [[self_substringWithString:caridbegin:12end:2]intValue];        NSTimeZone *localZone = [NSTimeZone localTimeZone];    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];    [dateFormattersetDateStyle:NSDateFormatterMediumStyle];    [dateFormattersetTimeStyle:NSDateFormatterNoStyle];    [dateFormattersetTimeZone:localZone];    [dateFormattersetDateFormat:@"yyyy-MM-dd HH:mm:ss"];    NSDate *date=[dateFormatterdateFrostr:[NSStringstringWithFormat:@"%d-%d-%d 12:01:01",                                                strYear, strMonth, strDay]];    if (date == nil) {      return NO;    }        const char *pid  = [caridUTF8String];    // 检验长度    if(18 != strlen(pid)) return NO;    // 校验数字    for (int i = 0; i < 18; i++) {      if ( !isdigit(pid[i]) && !(('X' == pid[i] || 'x' == pid[i]) && 17 == i) ) {        return NO;      }    }        // 验证最末的校验码    for (int i = 0; i <= 16; i++) {      lSumQT += (pid[i]-48) * R[i];    }        if (checkers[lSumQT%11] != pid[17] ) {      return NO;    }    return YES;  }        #pragma mark - Private  + (NSString *)_substringWithString:(NSString *)strbegin:(NSInteger)beginend:(NSInteger )end {    return [strsubstringWithRange:NSMakeRange(begin, end)];  }