iOS验证身份号码是否合法

/**

• 功能:验证身份证是否合法
• 参数:输入的身份证号
  */
  -(BOOL)chk18PaperId:(NSString *) sPaperId{
  //判断位数
  if ([sPaperId length] != 15 && [sPaperId length] != 18) {
  return NO;
  }
  NSString *carid = sPaperId;
  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 sChecker[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 *mString = [NSMutableString stringWithString:sPaperId];
  if ([sPaperId length] == 15) {
  [mString insertString:@"19" atIndex:6];
  long p = 0;
  const charchar *pid = [mString UTF8String];
  for (int i=0; i<=16; i++)
  {
  p += (pid[i]-48) * R[i];
  }
  int o = p%11;
  NSString *string_content = [NSString stringWithFormat:@"%c",sChecker[o]];
  [mString insertString:string_content atIndex:[mString length]];
  carid = mString;
  }
  //判断地区码
  NSString * sProvince = [carid substringToIndex:2];
  if (![self areaCode:sProvince]) {
  return NO;
  }
  //判断年月日是否有效
  //年份
  int strYear = [[self getStringWithRange:carid Value1:6 Value2:4] intValue];
  //月份
  int strMonth = [[self getStringWithRange:carid Value1:10 Value2:2] intValue];
  //日
  int strDay = [[self getStringWithRange:carid Value1:12 Value2:2] intValue];
  NSTimeZone *localZone = [NSTimeZone localTimeZone];
  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  [dateFormatter setDateStyle:NSDateFormatterMediumStyle];
  [dateFormatter setTimeStyle:NSDateFormatterNoStyle];
  [dateFormatter setTimeZone:localZone];
  [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
  NSDate *date=[dateFormatter dateFromString:[NSString stringWithFormat:@"%d-%d-%d 12:01:01",strYear,strMonth,strDay]];
  if (date == nil) {
  return NO;
  }
  const charchar *PaperId = [carid UTF8String];
  //检验长度
  if( 18 != strlen(PaperId)) return -1;
  //校验数字
  for (int i=0; i<18; i++)
  {
  if ( !isdigit(PaperId[i]) && !(('X' == PaperId[i] || 'x' == PaperId[i]) && 17 == i) )
  {
  return NO;
  }
  }
  //验证最末的校验码
  for (int i=0; i<=16; i++)
  {
  lSumQT += (PaperId[i]-48) * R[i];
  }
  if (sChecker[lSumQT%11] != PaperId[17] )
  {
  return NO;
  }
  return YES;
  }

-(BOOL)areaCode:(NSString *)code{
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
[dic setObject:@"北京" forKey:@"11"];
[dic setObject:@"天津" forKey:@"12"];
[dic setObject:@"河北" forKey:@"13"];
[dic setObject:@"山西" forKey:@"14"];
[dic setObject:@"内蒙古" forKey:@"15"];
[dic setObject:@"辽宁" forKey:@"21"];
[dic setObject:@"吉林" forKey:@"22"];
[dic setObject:@"黑龙江" forKey:@"23"];
[dic setObject:@"上海" forKey:@"31"];
[dic setObject:@"江苏" forKey:@"32"];
[dic setObject:@"浙江" forKey:@"33"];
[dic setObject:@"安徽" forKey:@"34"];
[dic setObject:@"福建" forKey:@"35"];
[dic setObject:@"江西" forKey:@"36"];
[dic setObject:@"山东" forKey:@"37"];
[dic setObject:@"河南" forKey:@"41"];
[dic setObject:@"湖北" forKey:@"42"];
[dic setObject:@"湖南" forKey:@"43"];
[dic setObject:@"广东" forKey:@"44"];
[dic setObject:@"广西" forKey:@"45"];
[dic setObject:@"海南" forKey:@"46"];
[dic setObject:@"重庆" forKey:@"50"];
[dic setObject:@"四川" forKey:@"51"];
[dic setObject:@"贵州" forKey:@"52"];
[dic setObject:@"云南" forKey:@"53"];
[dic setObject:@"西藏" forKey:@"54"];
[dic setObject:@"陕西" forKey:@"61"];
[dic setObject:@"甘肃" forKey:@"62"];
[dic setObject:@"青海" forKey:@"63"];
[dic setObject:@"宁夏" forKey:@"64"];
[dic setObject:@"新疆" forKey:@"65"];
[dic setObject:@"台湾" forKey:@"71"];
[dic setObject:@"香港" forKey:@"81"];
[dic setObject:@"澳门" forKey:@"82"];
[dic setObject:@"国外" forKey:@"91"];
if ([dic objectForKey:code] == nil) {
return NO;
}
return YES;
}

• (NSString *)getStringWithRange:(NSString *)carid Value1:(NSInteger )value1 Value2:(NSInteger )value2{
  return [carid substringWithRange:NSMakeRange(value1, value2)];
  }