Question

- (void)applicationDidFinishLaunching:(UIApplication *)application {   
    NSError *error = nil;
    NSString *username = [[NSUserDefaults standardUserDefaults] objectForKey:@"username"];
    NSString *str =  [SFHFKeychainUtils getPasswordForUsername:username andServiceName:@"mybibleapp" error:&error];
    NSLog(@"previous un");
    NSLog(@"%@", str);
    if(str != nil)
    {
      main_page *detailViewController = [[main_page alloc] initWithNibName:@"main_page" bundle:nil];
      // Pass the selected object to the new view controller.
      // detailViewController.localStringtextnote = localStringtextnote;
      [self.navigationController pushViewController:detailViewController animated:YES];
      [detailViewController release];
    }

When I put this code for navigating to main_page it shows an error that property navigationController not found on object of appdelegate so i put this code insted of the above

 main_page  *log = [[main_page alloc] initWithNibName:@"main_page" bundle:nil];
 [window addSubview:tabController.view];
 [window addSubview:log.view];
 [window makeKeyAndVisible];

the page is redirected to main_page but nothing is working in this way. no navigation in main_page is working, I cant redirect any page from the main_page. So what can I do to solve these errors.

Answer 1

You can create a “proxy” viewController without nib which is loaded in MainWindow’s navigationController and then do something like the following, in the proxy’s viewDidLoad

NSError *error = nil;
NSString *username = [[NSUserDefaults standardUserDefaults] objectForKey:@"username"];
NSString *str =  [SFHFKeychainUtils getPasswordForUsername:username andServiceName:@"mybibleapp" error:&error];
NSLog(@"previous un");

NSLog(@"%@", str);

UIViewController *controller;

if (!error && nil != str) {
    controller = [[DetailViewController alloc] init];
} else {
    controller = [[LoginViewController alloc] init];
}
[[self navigationController] pushViewController:controller animated:YES];
[controller release];