ios-邮箱判断和身份证判断

//邮箱地址的正则表达式
- (BOOL)isValidateEmail:(NSString *)email{
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:email];
}
// 身份证号码判断
- (BOOL)isCorrect:(NSString *)IDNumber
{
    if (IDNumber.length < 18) {
        return NO;
    }
    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;
    }
}
~~~

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