iphone session management

Question

How can I manage user sessions in an iPhone app? I get a username and password from the user on the first page of my app. The user may log out whenever he wants. How can I s

Answer 1

you can save username information on NSUserDefaults

-(void)saveToUserDefaults:(NSString*)myString
 {
    NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];

    if (standardUserDefaults) {
        [standardUserDefaults setObject:myString forKey:@"username"];
        [standardUserDefaults synchronize];
    }
 }

if you have username information on NSUserDefaults, you can get your username information

-(NSString*)retrieveFromUserDefaults
 {
    NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
    NSString *val = nil;

    if (standardUserDefaults) 
        val = [standardUserDefaults objectForKey:@"username"];

    return val;
 }

using:

NSString * username=[self retrieveFromUserDefaults:@"username"];
if (!([username length]==0)||![username isEqualToString:@""]) 
{
NSLog(@"no authentication and redirect authentication page ");
}
else 
{
NSLog(@"it's authentication!");
}