最近项目有一个验证身份证号是否有效的需求，封装了一个工具类。

        要用时，自己新建一个类，把如下.h, .m文件复制进去就ok , 

.h文件

//

//  WLIdNumberTool.h

//  WLNumber

//

//  Created by 汪亮 on 16/8/22.

//  Copyright © 2016年 深圳市寄轻松科技有限公司. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface WLIdNumberTool : NSObject

+ (BOOL) validateIdentityCard: (NSString *)value;

@end

.m文件

//

//  WLIdNumberTool.m

//  WLNumber

//

//  Created by 汪亮 on 16/8/22.

//  Copyright © 2016年 深圳市寄轻松科技有限公司. All rights reserved.

//

#import "WLIdNumberTool.h"

@implementation WLIdNumberTool

//验证身份证号码

+ (BOOL) validateIdentityCard: (NSString *)value

{

    value = [value stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    if ([value length] != 18) {

        return NO;

    }

    NSString *mmdd = @"(((0[13578]|1[02])(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)(0[1-9]|[12][0-9]|30))|(02(0[1-9]|[1][0-9]|2[0-8])))";

    NSString *leapMmdd = @"0229";

    NSString *year = @"(19|20)[0-9]{2}";

    NSString *leapYear = @"(19|20)(0[48]|[2468][048]|[13579][26])";

    NSString *yearMmdd = [NSString stringWithFormat:@"%@%@", year, mmdd];

    NSString *leapyearMmdd = [NSString stringWithFormat:@"%@%@", leapYear, leapMmdd];

    NSString *yyyyMmdd = [NSString stringWithFormat:@"((%@)|(%@)|(%@))", yearMmdd, leapyearMmdd, @"20000229"];

    NSString *area = @"(1[1-5]|2[1-3]|3[1-7]|4[1-6]|5[0-4]|6[1-5]|82|[7-9]1)[0-9]{4}";

    NSString *regex = [NSString stringWithFormat:@"%@%@%@", area, yyyyMmdd  , @"[0-9]{3}[0-9Xx]"];

    

    NSPredicate *regexTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

    if (![regexTest evaluateWithObject:value]) {

        return NO;

    }

    int summary = ([value substringWithRange:NSMakeRange(0,1)].intValue + [value substringWithRange:NSMakeRange(10,1)].intValue) *7 + ([value substringWithRange:NSMakeRange(1,1)].intValue + [value substringWithRange:NSMakeRange(11,1)].intValue) *9 + ([value substringWithRange:NSMakeRange(2,1)].intValue + [value substringWithRange:NSMakeRange(12,1)].intValue) *10 + ([value substringWithRange:NSMakeRange(3,1)].intValue + [value substringWithRange:NSMakeRange(13,1)].intValue) *5 + ([value substringWithRange:NSMakeRange(4,1)].intValue + [value substringWithRange:NSMakeRange(14,1)].intValue) *8 + ([value substringWithRange:NSMakeRange(5,1)].intValue + [value substringWithRange:NSMakeRange(15,1)].intValue) *4 + ([value substringWithRange:NSMakeRange(6,1)].intValue + [value substringWithRange:NSMakeRange(16,1)].intValue) *2 + [value substringWithRange:NSMakeRange(7,1)].intValue *1 + [value substringWithRange:NSMakeRange(8,1)].intValue *6 + [value substringWithRange:NSMakeRange(9,1)].intValue *3;

    NSInteger remainder = summary % 11;

    NSString *checkBit = @"";

    NSString *checkString = @"10X98765432";

    checkBit = [checkString substringWithRange:NSMakeRange(remainder,1)];// 判断校验位

    return [checkBit isEqualToString:[[value substringWithRange:NSMakeRange(17,1)] uppercaseString]];

}

@end

类方法调用：

    BOOL isYes;

    NSLog(@"isYes value: %@----" ,isYes?@"YES":@"NO");

    isYes = [WLIdNumberTool validateIdentityCard:@"513002199107201512"];

    NSLog(@"isYes value: %@" ,isYes?@"YES":@"NO");