How to update value with help of userid in iphone

I have a login page where I enter an username and password, then I get from server one userid which i store in my local database. It works but I have a problem in the second page updating the new value on the web server database. I want the value to change only when a user logs in. How can I pass a reference to a second page fo开发者_JAVA百科r a particular user and update the new value and make the change in the server database table. Your help is very vital to me.

Whenever you get UserId save it in one Nsstring .. create one more Nsstring in second class and create property for it.

@interface FaceBookProfile : UITableViewController {


    NSString *userId;

}
//getter setter method

@property (nonatomic,retain) NSString *userId;

And pass the user id from first view to second view like this

FaceBookProfile *detailViewController = [[FaceBookProfile alloc] initWithNibName:@"FaceBookProfile" bundle:nil];

    //to animate activity indicator


detailViewController.userId = userId;
    [self.navigationController pushViewController:detailViewController animated:YES];
    [detailViewController release];

you can pass any value like above to any class