常用正则表达式应用

 

1、判断是否是手机号码

//判断手机号
+ (BOOL)valueforPhoneNumber:(NSString *) textString
{
    NSString* number=@"^1[3|4|5|7|8][0-9]\\d{8}$";
    NSPredicate *numberPre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",number];
    return [numberPre evaluateWithObject:textString];
}

 

2、是否是字母或数字

//判断是否是数字或字母
+ (BOOL)vvlueforIDname:(NSString *)textString
{
    NSString* number=@"^[A-Za-z0-9]+$";
    NSPredicate *numberPre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",number];
    return [numberPre evaluateWithObject:textString];
}

 

3、验证身份证号码

//身份证验证
+ (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;
    }
    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]];
}

 

4、银行卡号验证(这个不属于正则运算)

+ (BOOL) checkCardNo:(NSString*) cardNo
{
    int oddsum = 0;     //奇数求和
    int evensum = 0;    //偶数求和
    int allsum = 0;
    int cardNoLength = (int)[cardNo length];
    int lastNum = [[cardNo substringFromIndex:cardNoLength-1] intValue];
    
    cardNo = [cardNo substringToIndex:cardNoLength - 1];
    for (int i = cardNoLength -1 ; i>=1;i--) {
        NSString *tmpString = [cardNo substringWithRange:NSMakeRange(i-1, 1)];
        int tmpVal = [tmpString intValue];
        if (cardNoLength % 2 ==1 ) {
            if((i % 2) == 0){
                tmpVal *= 2;
                if(tmpVal>=10)
                    tmpVal -= 9;
                evensum += tmpVal;
            }else{
                oddsum += tmpVal;
            }
        }else{
            if((i % 2) == 1){
                tmpVal *= 2;
                if(tmpVal>=10)
                    tmpVal -= 9;
                evensum += tmpVal;
            }else{
                oddsum += tmpVal;
            }
        }
    }
    
    allsum = oddsum + evensum;
    allsum += lastNum;
    if((allsum % 10) == 0)
        return YES;
    else
        return NO;
}

 

注：正则表达式详细介绍:http://www.admin10000.com/document/5944.html