OC에서 자주 사용하는 String 범주

Url에서 매개변수에 해당하는value 가져오기

+ (instancetype)stringWithUrlStr:(NSString *)webaddress WithKey:(NSString *)CS
{
    NSError *error;
    NSString *regTags=[[NSString alloc] initWithFormat:@"(^|&|\\?)+%@=+([^&]*)(&|$)",CS];
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regTags options:NSRegularExpressionCaseInsensitive error:&error];
    
    NSArray *matches = [regex matchesInString:webaddress
                                      options:0
                                        range:NSMakeRange(0, [webaddress length])];
    for (NSTextCheckingResult *match in matches) {
        NSString *tagValue = [webaddress substringWithRange:[match rangeAtIndex:2]];
        return tagValue;
    }
    return nil;
}

문자열에 중국어가 있는지 확인하기

+ (BOOL)stringIsContainChineseWithStr:(NSString *)str
{
    for(int i=0; i< [str length];i++){
        int a = [str characterAtIndex:i];
        if( a > 0x4e00 && a < 0x9fff) {
            return YES;
        }
    }
    return NO;
}

QQ번호 확인

- (BOOL)stringIsQQNumber
{
    NSRegularExpression * regex = [NSRegularExpression regularExpressionWithPattern:@"^[0-9]{5,15}$" options:0 error:nil];
    if (regex) {
        NSTextCheckingResult * resulte = [regex firstMatchInString:self options:0 range:NSMakeRange(0, self.length)];
        if (resulte) {
            return YES;
        }
        else
        {
            return NO;
        }
    }
    return NO;
}

핸드폰 번호인지 아닌지를 판단하다

- (BOOL)stringIsPhoneNumber
{
    // 
    NSRegularExpression * regex = [NSRegularExpression regularExpressionWithPattern:@"^[1][358][0-9]{9}" options:0 error:nil];
    if (regex) {
        NSTextCheckingResult * resulte = [regex firstMatchInString:self options:0 range:NSMakeRange(0,self.length)];
        if (resulte) {
            return YES;
        }
        else
        {
            return NO;
        }
    }
    return NO;
}

숫자

- (BOOL)stringIsNumber
{
    // 
    NSRegularExpression * regex = [NSRegularExpression regularExpressionWithPattern:@"^[0-9]*$" options:0 error:nil];
    if (regex) {
        NSTextCheckingResult * resulte = [regex firstMatchInString:self options:0 range:NSMakeRange(0, self.length)];
        if (resulte) {
            return YES;
        }
        else
        {
            return NO;
        }
    }
    return NO;
}

주민등록번호

+ (BOOL)stringIsCardNumber:(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)];//  
    return [checkBit isEqualToString:[[value substringWithRange:NSMakeRange(17,1)] uppercaseString]];
}

신분증 번호에 따라 연령과 성별을 얻다

+ (instancetype)stringGetAgeAndSexWithCardID:(NSString *)cardID
{
    NSString *sex, *age;
    NSString * ageString = [cardID substringWithRange:NSMakeRange(6, 4)];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"YYYY"];
    NSString *year = [formatter stringFromDate:[NSDate date]];
    int nowYear = [year intValue];
    if ([cardID length] == 18) {
        NSString * sexString = [cardID substringWithRange:NSMakeRange(16, 1)];
        age = [NSString  stringWithFormat:@"%d", nowYear - [ageString intValue]];
        if ([sexString intValue]%2 == 0) {
            sex = @" ";
        }else{
            sex = @" ";
        }
    }else  if ([cardID length] == 15){
        NSString * ageString = [cardID substringWithRange:NSMakeRange(6, 2)];
        age =  [NSString  stringWithFormat:@"%d", nowYear - [[NSString stringWithFormat:@"19%d",[ageString intValue]]intValue] ];
        NSString * sexString = [cardID substringWithRange:NSMakeRange(13, 1)];
        if ([sexString intValue]%2 == 0) {
            sex = @" ";
        }else{
            sex = @" ";
        }
    }
    return [age stringByAppendingString:sex];
}

MD5 암호화

+ (instancetype)stringWithMD5:(NSString *)str
{
    const char *cStr = [str UTF8String];
    unsigned char digest[CC_MD5_DIGEST_LENGTH];
    CC_MD5( cStr, (unsigned int)strlen(cStr), digest );
    
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
    
    for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02X", digest[i]];
    
    return output;
}

sha1 암호화

+ (instancetype)stringWithsha1:(NSString *)str
{
    const char *cstr = [str cStringUsingEncoding:NSUTF8StringEncoding];
    NSData *data = [NSData dataWithBytes:cstr length:str.length];
    
    uint8_t digest[CC_SHA1_DIGEST_LENGTH];
    
    CC_SHA1(data.bytes, (unsigned int)data.length, digest);
    
    NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
    
    for(int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02x", digest[i]];
    
    return output;
}

IP 확보

+ (instancetype)stringWithIP
{
    NSString *address = @"an error occurred when obtaining ip address";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    
    success = getifaddrs(&interfaces);
    
    if (success == 0) { // 0  
        
        temp_addr = interfaces;
        while (temp_addr != NULL) {
            if( temp_addr->ifa_addr->sa_family == AF_INET) {
                // Check if interface is en0 which is the wifi connection on the iPhone
                if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    // Get NSString from C String
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            
            temp_addr = temp_addr->ifa_next;
        }
    }
    freeifaddrs(interfaces);
    return address;
}