如何获取 cookie 并将其用于其他请求，例如 POST ( iOS )？

My 上一个问题 https://stackoverflow.com/questions/12538782/how-to-remain-logged-in-until-user-decides-to-logout/是关于我每次都必须登录才能执行网络服务（例如发布链接或上传图片）的问题。 Philipe 回答说我必须使用 cookie 而不是每个请求的登录过程。我找到了获取cookies的方法：

- (void)getCookies {

    NSHTTPURLResponse * response;
    NSError * error;
    NSMutableURLRequest *request;

    request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://MyWebsite.com/login.php"]
                                            cachePolicy:NSURLRequestReloadIgnoringCacheData
                                        timeoutInterval:120];
    NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]);
    NSArray * all = [NSHTTPCookie cookiesWithResponseHeaderFields:[response allHeaderFields] forURL:[NSURL URLWithString:@"http://MyWebsite.com/login.php"]];
    NSLog(@"%d", all.count);

    for (NSHTTPCookie *cookie in all) {
        NSLog(@"Name: %@ : Value: %@", cookie.name, cookie.value);
        NSLog(@"Comment: %@ : CommentURL: %@", cookie.comment, cookie.commentURL);
        NSLog(@"Domain: %@ : ExpiresDate: %@", cookie.domain, cookie.expiresDate);
        NSLog(@"isHTTPOnly: %c : isSecure: %c", cookie.isHTTPOnly, cookie.isSecure);
        NSLog(@"isSessionOnly: %c : path: %@", cookie.isSessionOnly, cookie.path);
        NSLog(@"portList: %@ : properties: %@", cookie.portList, cookie.properties);
        NSLog(@"version: %u", cookie.version);
    }
} 

我还找到了使用这些 cookie 的代码，但我不知道如何使用它：

[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookies];

这是我的 POST 方法，我使用 RestKit API：

- (IBAction)addLinkPressed:(UIButton *)sender {

        [RKClient clientWithBaseURLString:@"http://MyWebsite.com"];

        NSDictionary* params = [NSDictionary dictionaryWithObjectsAndKeys:
                                self.linkField.text, @"url",
                                self.linkTitleField.text, @"title",
                                self.linkSummaryField.text, @"summary",
                                nil];

        RKRequest *request = [[RKClient sharedClient] post:@"/send_link.php" params:params delegate:self];
        [request setUserData:@"sendLink"];   
}

问题：我应该存储 cookie 的哪些属性以将其用于登录信息以及我应该将其放在代码中的什么位置？

我通过一些低效的方式解决了这个问题。这是我的方法： 首先，我尝试发布到网络服务，发布后我解析返回的 HTML 以查看发布是否成功。如果发布成功，我会向用户发出一条适当的消息，表明您发布成功，但如果不成功，可能有两个原因：第一：发布执行期间出现一些错误第二：用户未登录。我认识到第一个错误和第二个错误之间的区别只是解析响应 HTML。 这是我用于此方法的代码（这是用户想要更改密码的时间）

- (void)objectLoader:(RKObjectLoader*)objectLoader didFailWithError:(NSError*)error {
    NSRange range = [[error localizedDescription] rangeOfString:@"-1012"];
    if (range.length > 0){
        //First error occurs here
    }
    RKLogError(@"Hit error: %@", error);
}



- (IBAction)requestToChangePasswordPressed {
    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    hud.labelText = @"Loading";

    [RKClient clientWithBaseURLString:@"http://WebServiceDomain.com"];

    NSDictionary* params = [NSDictionary dictionaryWithObjectsAndKeys:
                            self.oldPasswordField.text, @"oldPassword",
                            self.passwordNew.text, @"newPassword",
                            self.confirmPasswordField.text, @"confirmPassword",
                            nil];

    RKRequest *request = [[RKClient sharedClient] post:@"/change_password.php" params:params delegate:self];
    [request setUserData:@"changePassword"];
    [self.view endEditing:YES];
    [MBProgressHUD hideHUDForView:self.view animated:YES];
}

- (void)autoLogin {

    [RKClient clientWithBaseURLString:@"http://WebServiceDomain.com"];
    [RKObjectManager sharedManager].client=[RKClient sharedClient];
    RKParams *parameters = [RKParams params];

    [parameters setValue:[[NSUserDefaults standardUserDefaults] objectForKey:@"defaultUsername"] forParam:@"username"];
    [parameters setValue:[[NSUserDefaults standardUserDefaults] objectForKey:@"defaultPassword"] forParam:@"password"];

    [[RKClient sharedClient] setAuthenticationType:RKRequestAuthenticationTypeHTTP];
    // because we have two POSTs and we want to use the same method for both of the for didLoadResponse: we set the UserDate like bellow
    RKRequest *request = [[RKClient sharedClient] post:@"/login.php" params:parameters delegate:self];
    [request setUserData:@"login"];
}


- (void)request:(RKRequest*)request didLoadResponse:(RKResponse*)response
{
    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    hud.labelText = @"Loading";

    id userData = [request userData];
    if ([userData isEqual:@"login"]) {

        if ([request isGET]) {
            // Handling GET /foo.xml

            if ([response isOK]) {
                // Success! Let's take a look at the data
                NSLog(@"Retrieved XML: %@", [response bodyAsString]);
            }

        } else if ([request isPOST]) {

            // Handling POST /other.json
            if ([response isJSON]) {
                NSLog(@"Got a JSON response back from our POST!");
            }

        } else if ([request isDELETE]) {

            // Handling DELETE /missing_resource.txt
            if ([response isNotFound]) {
                NSLog(@"The resource path '%@' was not found.", [request resourcePath]);
            }
        }
    }

    else if ([userData isEqual:@"sendLink"]) {
        NSData *addLinksHtmlData = response.body;

        // 2
        TFHpple *addlinksParser = [TFHpple hppleWithHTMLData:addLinksHtmlData];

        // 3
        NSString *errorLinksXpathQueryString = @"//div[@class='errorBox']/ul/li";
        NSArray *errorLinksNodes = [addlinksParser searchWithXPathQuery:errorLinksXpathQueryString];


        // 4
        NSMutableArray *newErrorLinks = [[NSMutableArray alloc] initWithCapacity:0];
        for (TFHppleElement *element in errorLinksNodes) {
            // 5
            AllModels *errorTitle = [[AllModels alloc] init];
            [newErrorLinks addObject:errorTitle];

            // 6
            errorTitle.errorTitle = [[element firstChild] content];
        }

        // 8
        self.linkErrorObjects = newErrorLinks;



        NSString *successLinksXpathQueryString = @"//div[@class='successBox']";
        NSArray *successLinksNodes = [addlinksParser searchWithXPathQuery:successLinksXpathQueryString];


        // 4
        NSMutableArray *newSuccessLinks = [[NSMutableArray alloc] initWithCapacity:0];
        for (TFHppleElement *element in successLinksNodes) {
            // 5
            AllModels *successTitle = [[AllModels alloc] init];
            [newSuccessLinks addObject:successTitle];

            // 6
            successTitle.successTitle = [[element firstChild] content];
        }

        // 8
        self.linkSuccessObjects = newSuccessLinks;

    }


    else {

        NSLog(@"HTTP status code:     %d", response.statusCode);
        NSLog(@"HTTP status message:  %@", [response localizedStatusCodeString]);
        NSLog(@"Header fields: %@", response.allHeaderFields);
        NSLog(@"Body: %@", response.bodyAsString);


        NSData *HtmlData = response.body;

        // 2
        TFHpple *addParser = [TFHpple hppleWithHTMLData:HtmlData];

        // 3
        NSString *errorXpathQueryString = @"//div[@class='errorBox']/ul/li";
        NSArray *errorNodes = [addParser searchWithXPathQuery:errorXpathQueryString];


        // 4
        NSMutableArray *newError = [[NSMutableArray alloc] initWithCapacity:0];
        for (TFHppleElement *element in errorNodes) {
            // 5
            AllModels *errorTitle = [[AllModels alloc] init];
            [newError addObject:errorTitle];

            // 6
            errorTitle.errorTitle = [[element firstChild] content];
        }

        // 8
        self.ErrorObjects = newError;



        NSString *successXpathQueryString = @"//div[@class='successBox']";
        NSArray *successNodes = [addParser searchWithXPathQuery:successXpathQueryString];


        // 4
        NSMutableArray *newSuccess = [[NSMutableArray alloc] initWithCapacity:0];
        for (TFHppleElement *element in successNodes) {
            // 5
            AllModels *successTitle = [[AllModels alloc] init];
            [newSuccess addObject:successTitle];

            // 6
            successTitle.successTitle = [[element firstChild] content];
        }

        // 8
        self.successObjects = newSuccess;

        [self errorCheck];
    }
    [MBProgressHUD hideHUDForView:self.view animated:YES];
    [MBProgressHUD hideHUDForView:self.view animated:YES];
}



- (void)errorCheck {

    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    hud.labelText = @"Loading";

    if(self.errorObjects.count > 0) {
        AllModels *errorlink = [self.errorObjects objectAtIndex:0];
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"There is a problem" message:errorlink.errorTitle delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil , nil];
        [alert show];
    }
    else {


        if(self.linkErrorObjects.count > 0) {
            [self autoLogin];
            [self requestToChangePasswordPressed];
        }

        else {
            AllModels *successlink = [self.successObjects objectAtIndex:0];
            self.successLabel.hidden = NO;
            self.successLabel.text = successlink.successTitle;
            NSLog(@"Success Title:  %@",successlink.successTitle);


            [UIView animateWithDuration:3.0
                                  delay:0.0
                                options:UIViewAnimationOptionBeginFromCurrentState
                             animations:^{ self.successLabel.alpha = 0.0; }
                             completion:^(BOOL fin) { if (fin) [self.successLabel removeFromSuperview]; }];


            [self performSelector:@selector(dismissModalViewController) withObject:nil afterDelay:1.0];
        }

    }
    [MBProgressHUD hideHUDForView:self.view animated:YES];
    [MBProgressHUD hideHUDForView:self.view animated:YES];
}