iOS 一句代码验证身份证号

公司App有一业务需要根据用户身份证号判断是否属于我们客户
所以需要进行身份证号验证
上代码

+ (BOOL)isCorrect:(NSString *)IDNumber {
 NSMutableArray *IDArray = [NSMutableArray array];
// 遍历身份证字符串,存入数组中
 for (int i = 0; i < 18; i++) {
    NSRange range = NSMakeRange(i, 1);
    NSString *subString = [IDNumber substringWithRange:range];
    [IDArray addObject:subString];
 }

// 系数数组
 NSArray *coefficientArray = [NSArray arrayWithObjects:@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2", nil];

// 余数数组
 NSArray *remainderArray = [NSArray arrayWithObjects:@"1", @"0", @"X", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2", nil];

// 每一位身份证号码和对应系数相乘之后相加所得的和
 int sum = 0;
 for (int i = 0; i < 17; i++) {
    int coefficient = [coefficientArray[i] intValue];
    int ID = [IDArray[i] intValue];
    sum += coefficient * ID;
 }

// 这个和除以11的余数对应的数
 NSString *str = remainderArray[(sum % 11)];

// 身份证号码最后一位
 NSString *string = [IDNumber substringFromIndex:17];

// 如果这个数字和身份证最后一位相同,则符合国家标准,返回YES
 if ([str isEqualToString:string]) {
    return YES;
 } else {
    return NO;
 }
}

//或者

+ (BOOL) judgeIdentityStringValid:(NSString *)identityString {
 if (identityString.length != 18) 
 return NO;
 NSString *regex2 = @"^(^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$)|(^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])((\\d{4})|\\d{3}[Xx])$)$";
 NSPredicate *identityStringPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];
 if(![identityStringPredicate evaluateWithObject:identityString])
 return NO;

 NSArray *idCardWiArray = @[@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2"];
 NSArray *idCardYArray = @[@"1", @"0", @"10", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2"];

 NSInteger idCardWiSum = 0;
 for(int i = 0;i < 17;i++) {
    NSInteger subStrIndex = [[identityString substringWithRange:NSMakeRange(i, 1)] integerValue];
    NSInteger idCardWiIndex = [[idCardWiArray objectAtIndex:i] integerValue];
    idCardWiSum+= subStrIndex * idCardWiIndex;
 }
 NSInteger idCardMod=idCardWiSum%11;
 NSString *idCardLast= [identityString substringWithRange:NSMakeRange(17, 1)];
 if(idCardMod==2) {
    if(![idCardLast isEqualToString:@"X"]||[idCardLast isEqualToString:@"x"]) {
       return NO;
    }
 }
else {
     if(![idCardLast isEqualToString: [idCardYArray objectAtIndex:idCardMod]]) {
    return NO;
    }
 }
 return YES;
}
//判断是否符合身份证编码规则
``