创建一个NSPredicate的分类:NSPredicate+HMAdditions
在.h中:
#import <Foundation/Foundation.h>
@interface NSPredicate (HMAdditions)
+ (BOOL)checkEmail:(NSString *)email;
+ (BOOL)checkIDNumber:(NSString *)IDNumber;
@end
在.m中
#import "NSPredicate+HMAdditions.h"
@implementation NSPredicate (HMAdditions)
+ (BOOL)checkEmail:(NSString *)email
{
NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *predicate = [self predicateWithFormat:@"SELF MATCHES %@", regex];
return [predicate evaluateWithObject:email];
}
+ (BOOL)checkIDNumber:(NSString *)IDNumber
{
BOOL flag = NO;
if (IDNumber.length <= 0) {
return flag;
}
NSString *regex = @"^(^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$)|(^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])((\\d{4})|\\d{3}[Xx])$)$";
NSPredicate *predicate = [self predicateWithFormat:@"SELF MATCHES %@", regex];
flag = [predicate evaluateWithObject:IDNumber];
//如果通过该验证,说明身份证格式正确,但准确性还需计算
if(flag) {
if(IDNumber.length==18) {
//将前17位加权因子保存在数组里
NSArray * idCardWiArray = @[@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2"];
//这是除以11后,可能产生的11位余数、验证码,也保存成数组
NSArray * idCardYArray = @[@"1", @"0", @"10", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2"];
//用来保存前17位各自乖以加权因子后的总和
NSInteger idCardWiSum = 0;
for(int i = 0;i < 17;i++) {
NSInteger subStrIndex = [[IDNumber substringWithRange:NSMakeRange(i, 1)] integerValue];
NSInteger idCardWiIndex = [[idCardWiArray objectAtIndex:i] integerValue];
idCardWiSum+= subStrIndex * idCardWiIndex;
}
//计算出校验码所在数组的位置
NSInteger idCardMod=idCardWiSum%11;
//得到最后一位身份证号码
NSString * idCardLast= [IDNumber substringWithRange:NSMakeRange(17, 1)];
//如果等于2,则说明校验码是10,身份证号码最后一位应该是X
if(idCardMod==2) {
if([idCardLast isEqualToString:@"X"]||[idCardLast isEqualToString:@"x"]) {
return flag;
}else {
flag = NO;
return flag;
}
}else {
//用计算出的验证码与最后一位身份证号码匹配,如果一致,说明通过,否则是无效的身份证号码
if([idCardLast isEqualToString: [idCardYArray objectAtIndex:idCardMod]]) {
return flag;
} else {
flag = NO;
return flag;
}
}
} else {
flag = NO;
return flag;
}
} else {
return flag;
}
}
@end