根据身份号 计算生日 年龄 性别

/**
 
 从身份证上获取年龄 18位身份证
 
 */

-(NSString *)getIdentityCardAge:(NSString *)numberStr

{
    NSDateFormatter *formatterTow = [[NSDateFormatter alloc]init];
    [formatterTow setDateFormat:@"yyyy-MM-dd"];
    NSDate *bsyDate = [formatterTow dateFromString:[self birthdayStrFromIdentityCard:numberStr]];
    NSTimeInterval dateDiff = [bsyDate timeIntervalSinceNow];
    int age = trunc(dateDiff/(60*60*24))/365;
    return [NSString stringWithFormat:@"%d",-age];
    
}
-(NSString *)birthdayStrFromIdentityCard:(NSString *)numberStr
{
    NSMutableString *result = [NSMutableString stringWithCapacity:0];
    NSString *year = nil;
    NSString *month = nil;
    BOOL isAllNumber = YES;
    NSString *day = nil;
    
    if([numberStr length]<18)
        return result;
    //**从第6位开始 截取8个数
    NSString *fontNumer = [numberStr substringWithRange:NSMakeRange(6, 8)];
    //**检测前12位否全都是数字;
    const char *str = [fontNumer UTF8String];
    const char *p = str;
    while (*p!='\0') {
        if(!(*p>='0'&&*p<='9'))
            isAllNumber = NO;
        p++;
    }
    
    if(!isAllNumber)
        return result;
    year = [NSString stringWithFormat:@"19%@",[numberStr substringWithRange:NSMakeRange(8, 2)]];
    month = [numberStr substringWithRange:NSMakeRange(10, 2)];
    day = [numberStr substringWithRange:NSMakeRange(12,2)];
    [result appendString:year];
    [result appendString:@"-"];
    [result appendString:month];
    [result appendString:@"-"];
    [result appendString:day];
    return result;
}

//根据身份证号性别
-(NSString *)getIdentityCardSex:(NSString *)numberStr
{
    int sexInt=[[numberStr substringWithRange:NSMakeRange(16,1)] intValue];
    
    if(sexInt%2!=0)
    {
        // 男
        return @"1";
    }
    else
    {
        // 女
        return @"2";
    }
}