正則表示式
**身份證驗證：
方式一：只能判斷18位身份證：但是方法優於方法二**

+ (BOOL)checkIdentityCardNo:(NSString*)cardNo
{
    if (cardNo.length != 18) {
        return  NO;
    }
    NSArray* codeArray = [NSArray arrayWithObjects:@"7",@"9",@"10",@"5",@"8",@"4",@"2",@"1",@"6",@"3",@"7",@"9",@"10",@"5",@"8",@"4",@"2", nil];
    NSDictionary
 
* checkCodeDic = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:@"1",@"0",@"X",@"9",@"8",@"7",@"6",@"5",@"4",@"3",@"2", nil]  forKeys:[NSArray arrayWithObjects:@"0",@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10", nil]];

    NSScanner* scan = [NSScanner scannerWithString:[cardNo substringToIndex:17
 
]];

    int val;
    BOOL isNum = [scan scanInt:&val] && [scan isAtEnd];
    if (!isNum) {
        return NO;
    }
    int sumValue = 0;

    for (int i =0; i<17; i++) {
        sumValue+=[[cardNo substringWithRange:NSMakeRange(i , 1) ] intValue]* [[codeArray objectAtIndex:i] intValue];
    }

    NSString
 
* strlast = [checkCodeDic objectForKey:[NSString stringWithFormat:@"%d",sumValue%11]];

    if ([strlast isEqualToString: [[cardNo substringWithRange:NSMakeRange(17, 1)]uppercaseString]]) {
        return YES;
    }
    return  NO;
}

方式二：判斷18位15位身份證

+ (BOOL)PINpersonalIdentificationNumber:(NSString *) textString
{
    NSString* number=@"(\\d{14}[0-9a-zA-Z])|(\\d{17}[0-9a-zA-Z])";
    NSPredicate *numberPre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",number];
    if ([numberPre evaluateWithObject:textString]) {
        NSRange range1 = NSMakeRange(0, 1);
        NSInteger one = [[textString substringWithRange:range1] integerValue];
        if (one < 9 && one > 0) {
            NSRange range2 = NSMakeRange(1, 1);
            NSInteger two = [[textString substringWithRange:range2] integerValue];
            if (two < 8 && two >= 0) {
                NSRange range3 = NSMakeRange(6, 4);
                NSString *year = [textString substringWithRange:range3];
                NSRange range4 = NSMakeRange(10, 2);
                NSString *month = [textString substringWithRange:range4];
                NSRange range5 = NSMakeRange(12, 2);
                NSString *day = [textString substringWithRange:range5];
                NSString *DateText = [NSString stringWithFormat:@"%@-%@-%@",year,month,day];
                NSString *Date = @"(([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]{1}|[0-9]{1}[1-9][0-9]{2}|[1-9][0-9]{3})-(((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]))))|((([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))-02-29)";
                NSPredicate *numberPre1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",Date];
                if ([numberPre1 evaluateWithObject:DateText]) {
                    return YES;
                }else{
                    return NO;
                }
            }else{
                return NO;
            }
        }else{
            return NO;
        }
    }else{
        return NO;
    }
}

日期驗證：
閏年的2月份有29天，因此匹配閏年日期格式為YYYY-MM-DD的正則表示式為：

(([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))-02-29

最後，將平年和閏年的日期驗證表示式合併，我們得到最終的驗證日期格式為YYYY-MM-DD的正則表示式為：

(([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]{1}|[0-9]{1}[1-9][0-9]{2}|[1-9][0-9]{3})-(((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]))))|((([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))-02-29)

DD/MM/YYYY格式的正則驗證表示式為：

(((0[1-9]|[12][0-9]|3[01])/((0[13578]|1[02]))|((0[1-9]|[12][0-9]|30)/(0[469]|11))|(0[1-9]|[1][0-9]|2[0-8])/(02))/([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]{1}|[0-9]{1}[1-9][0-9]{2}|[1-9][0-9]{3}))|(29/02/(([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00)))

電話號碼驗證：

+ (BOOL) isMobile:(NSString *)mobileNumbel{
    /**
     * 手機號碼
     * 移動：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     * 聯通：130,131,132,152,155,156,185,186
     * 電信：133,1349,153,180,189,181(增加)
     */
    NSString * MOBIL = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
    /**
     10         * 中國移動：China Mobile
     11         * 134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     12         */
    NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[2378])\\d)\\d{7}$";
    /**
     15         * 中國聯通：China Unicom
     16         * 130,131,132,152,155,156,185,186
     17         */
    NSString * CU = @"^1(3[0-2]|5[256]|8[56])\\d{8}$";
    /**
     20         * 中國電信：China Telecom
     21         * 133,1349,153,180,189,181(增加)
     22         */
    NSString * CT = @"^1((33|53|8[019])[0-9]|349)\\d{7}$";

    NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBIL];
    NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];
    NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];
    NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];

    if (([regextestmobile evaluateWithObject:mobileNumbel]
         || [regextestcm evaluateWithObject:mobileNumbel]
         || [regextestct evaluateWithObject:mobileNumbel]
         || [regextestcu evaluateWithObject:mobileNumbel])) {
        return YES;
    }

    return NO;
}