验证身份证

#import <Foundation/Foundation.h>

@interface STValidateUtil : NSObject


//身份证校验
+ (BOOL)verifyIDCardNumber:(NSString *)value;


@end

#import "STValidateUtil.h"

@implementation STValidateUtil


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