Question

How can I pass a user ID from my login page to an end page to allow the user access to my application? I want to make a application like Yahoo; if we open a Yahoo page, and enter our user name and password for login, then wherever we go we don’t have any problem. If we want to update our profile we can do so easily. I want the same for my iPhone application; the user logs in and I can then use the ID throughout my application, and if the user wants to update, then he can easily update values in the server’s database.

Answer 1

If you are aware about application delegate than you can do it like, Declare one variable let say user id is integer than as follows.

@interface YourAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    LenseCareViewController *viewController;
    NSInteger intUserID;
}
@property (nonatomic,readwrite) NSInteger intUserID; //Synthesize this variable in implementation

//Your Header File 
#import "YourAppDelegate.h"

@interface YourViewController : UIViewController
{
    YourAppDelegate *appDelegate;
}

@property(nonatomic,retain) YourAppDelegate *appDelegate;

@end

//Your Implementation file
@implementation YourViewController
@synthesize appDelegate

- (void)viewDidLoad {
    self.appDelegate = (YourAppDelegate*) [[UIApplication sharedApplication] delegate];
    self.appDelegate.intUserID = 5; //Assign value to this variable and you can have access globally.
}

@end

Hope it helps. If any doubts please leave a comment.