(BOOL) validateIdentityCard: (NSString *)value
{
//value = @"身份证号码";
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
NSLog(@"==========%d",[checkBit isEqualToString:[[value substringWithRange:NSMakeRange(17,1)] uppercaseString]]);
return [checkBit isEqualToString:[[value substringWithRange:NSMakeRange(17,1)] uppercaseString]];
}