iOS校验身份证是否合法

//身份证号验证 1900+/2000+的年份日期的正则表达式经过修改，目前貌似是对的，如果哪位朋友发现错误希望能够给与提示
//返回yes位表示格式正确，否则为错误
-(BOOL)IDCardAuth:(NSString *)value
{
    //stringByTrimmingCharactersInSet ：去除字符串中的特殊字符
    //[NSCharacterSet whitespaceAndNewlineCharacterSet] 空格
    //自定义要去除的特殊字符
    //NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@／：；（）¥「」＂、[]{}#%-*+=_\\|~＜＞$€^•'@#$%^&*()_+'\""];
    value = [value stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    NSInteger length =;

    if (!value) {

        return NO;

    }else {

        length = value.length;

        if (length != && length !=) {
            return NO;
        }
    }

    // 省份代码
    NSArray *areasArray =@[@"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"",@"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @"",@"", @""];

    NSString *valueStart2 = [value substringToIndex:];

    BOOL areaFlag =NO;

    for (NSString *areaCode in areasArray) {

        if ([areaCode isEqualToString:valueStart2]) {

            areaFlag =YES;

            break;

        }

    }

    if (!areaFlag) {

        return false;

    }
    //生日部分的编码
    NSRegularExpression *regularExpression;

    NSUInteger numberofMatch;

    NSInteger year =;

    switch (length) {

        case :

            year = [value substringWithRange:NSMakeRange(,)].intValue +;

            if (year % == || (year % != && year % ==)) {

                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$"

                                                                       options:NSRegularExpressionCaseInsensitive

                                                                         error:nil];//测试出生日期的合法性

            }else {

                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$"

                                                                       options:NSRegularExpressionCaseInsensitive

                                                                         error:nil];//测试出生日期的合法性

            }
            //numberofMatch:匹配到得字符串的个数
            numberofMatch = [regularExpression numberOfMatchesInString:value

                                                              options:NSMatchingReportProgress

                                                                range:NSMakeRange(, value.length)];

            if(numberofMatch >) {

                return YES;

            }else {

                return NO;

            }

        case :

            year = [value substringWithRange:NSMakeRange(,)].intValue;

            if (year % == || (year % != && year % ==)) {

                //原来的@"^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$"
                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$"

                                                                       options:NSRegularExpressionCaseInsensitive

                                                                         error:nil];//测试出生日期的合法性

            }else {

                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$"

                                                                       options:NSRegularExpressionCaseInsensitive

                                                                         error:nil];//测试出生日期的合法性

            }

            numberofMatch = [regularExpression numberOfMatchesInString:value

                                                              options:NSMatchingReportProgress

                                                                range:NSMakeRange(, value.length)];
            //验证校验位
            if(numberofMatch >) {

                int S = ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + ([value substringWithRange:NSMakeRange(,)].intValue + [value substringWithRange:NSMakeRange(,)].intValue) * + [value substringWithRange:NSMakeRange(,)].intValue * + [value substringWithRange:NSMakeRange(,)].intValue * + [value substringWithRange:NSMakeRange(,)].intValue *;

                int Y = S %;

                NSString *M =@"F";

                NSString *JYM =@"10X98765432";

                M = [JYM substringWithRange:NSMakeRange(Y,)];// 判断校验位

                if ([M isEqualToString:[value substringWithRange:NSMakeRange(,)]]) {

                    return YES;// 检测ID的校验位

                }else {

                    return NO;

                }

            }else {

                return NO;

            }

        default:

            return false;
    }
}