iOS应用中的会话变量

Question

我一直在尝试获取在iOS应用中使用Session变量的帮助。我搜索的越多，我就越困惑。有些人说只是在NSUserDefaults中存储用户数据，其他人说在Auth Header中发送令牌，还有更多人说使用Session类方法并从每个类调用它

不幸的是现在我不知道我应该做什么。我有一个正常工作的登录脚本，并设置$ _SESSION变量，我只是不知道如何在应用程序中使用这些变量。

编辑清晰度

确定我真正需要的是一种将$ _SESSION变量回显到我的应用程序然后访问该信息的方法。我看过有关NSCookieStorage的信息，以及它自动存储cookie的事实是正确的吗？如果是的话，我该如何使用它？我是否必须回复结果以填充cookie或者当登录成功回来时是否自动发送了cookie？

登录脚本

//
//  LoginViewController.m
//  TESG-iConnect
//
//  Created by TESG on 5/03/14.
//  Copyright (c) 2014 TESG. All rights reserved.
//
#import "LoginViewController.h"



@interface LoginViewController ()

@end


@implementation LoginViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



- (IBAction)signinClicked:(id)sender {
        NSInteger success = 0;
        @try {

            if([[self.txtUsername text] isEqualToString:@""] || [[self.txtPassword text] isEqualToString:@""] ) {

                [self alertStatus:@"Please enter TESG Portal Username and Password" :@"Sign in Failed!" :0];

            } else {
                NSString *post =[[NSString alloc] initWithFormat:@"username=%@&password=%@",[self.txtUsername text],[self.txtPassword text]];
                NSLog(@"PostData: %@",post);

                NSURL *url=[NSURL URLWithString:@"http://tesg.com.au/loginJson.php"];

                NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

                NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

                NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
                [request setURL:url];
                [request setHTTPMethod:@"POST"];
                [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
                [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
                [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
                [request setHTTPBody:postData];

                //[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];

                NSError *error = [[NSError alloc] init];
                NSHTTPURLResponse *response = nil;
                NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

                NSLog(@"Response code: %ld", (long)[response statusCode]);

                if ([response statusCode] >= 200 && [response statusCode] < 300)
                {
                    NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
                    NSLog(@"Response ==> %@", responseData);

                    NSError *error = nil;
                    NSDictionary *jsonData = [NSJSONSerialization
                                              JSONObjectWithData:urlData
                                              options:NSJSONReadingMutableContainers
                                              error:&error];

                    success = [jsonData[@"success"] integerValue];
                    NSLog(@"Success: %ld",(long)success);

                    if(success == 1)
                    {
                        NSLog(@"Login SUCCESS");
                    } else {

                        NSString *error_msg = (NSString *) jsonData[@"error_message"];
                        [self alertStatus:error_msg :@"Sign in Failed!" :0];
                    }

                } else {
                    //if (error) NSLog(@"Error: %@", error);
                    [self alertStatus:@"Connection Failed" :@"Sign in Failed!" :0];
                }
            }
        }
        @catch (NSException * e) {
            NSLog(@"Exception: %@", e);
            [self alertStatus:@"Sign in Failed." :@"Error!" :0];
        }
        if (success) {
            [self performSegueWithIdentifier:@"login_success" sender:self];
        }
    }

    - (void) alertStatus:(NSString *)msg :(NSString *)title :(int) tag
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
                                                            message:msg
                                                           delegate:self
                                                  cancelButtonTitle:@"Ok"
                                                  otherButtonTitles:nil, nil];
        alertView.tag = tag;
        [alertView show];
    }


- (IBAction)backgroundTap:(id)sender {
    [self.view endEditing:YES];
}

-(BOOL) textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    return YES;
}
@end

php登录脚本

<?php

header('Content-type: application/json');

require_once('DbConnector.php');

$connector = new DbConnector();

$username=htmlspecialchars($_POST['username'],ENT_QUOTES);
$password=md5($_POST['password']);

$sql="SELECT id, username, password, access, name FROM users WHERE username='".$username."' AND enabled = '1'";
$result=mysql_query($sql);
$row=mysql_fetch_array($result);

//if username exists
if(mysql_num_rows($result)>0)
{
    //compare the password
    if(strcmp($row['password'],$password)==0)
    {
        //now set the session from here if needed
        $_SESSION['id']=$row['id'];
        $_SESSION['username']=$row['username'];
        $_SESSION['access']=$row['access'];
        $_SESSION['name']=$row['name'];     

        //if($row['access']=='0')
        //{
        echo '{"success":1}';

 } else {
    echo '{"success":0,"error_message":"Username and/or password is invalid."}';
}
}else {    echo '{"success":0,"error_message":"Username and/or password is invalid."}';}    



?>

任何有关设置会话并使用它们来回发送数据的帮助都会很棒。