Different UIViewController logged in - ios

Question

When user open the app it show login UIViewController. When user log in it redirect to next mapkit UIViewController. But when user open app again I would like that he will skip login UIViewController. How can I do that? I tried programatically redirect in login method viewWillAppear but it works bad(It show controller for second).

Answer 1

A better way is to add this check in the AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
if(isLoggedin) {
Storyboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *mapViewController = [storyboard instantiateViewControllerWithIdentifier:#"mapViewController" ];
self.rootViewController = [[UINavigationCotroller alloc] initWithRootViewController:mapViewController];
}
return YES;
}

Answer 2

Instead of checking the login in the viewWillAppear: method of the first view controller, do it in the didFinishLaunchingWithOptions: method of your application delegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
if (loggedIn) {
UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
[navigationController.topViewController performSegueWithIdentifier:#"1to2" sender:navigationController.topViewController];
return YES;
}
}
where 1to2 is the identifier of the segue from view controller 1 to 2.

Answer 3

You can do it like this:
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// replace with your real auth-checking
if ([self wasAuthorized] == NO) {
[self showLoginController];
}
return YES;
}
- (UIViewController *)mainController {
UINavigationController *rootNavigationController = (UINavigationController *)[[self window] rootViewController];
return [[rootNavigationController viewControllers] firstObject];
}
- (void)showLoginController {
UIViewController *loginController = [self loginController];
dispatch_async(dispatch_get_main_queue(), ^{
[self.mainController presentViewController:loginController animated:YES completion:nil];
});
}
- (UIViewController *)loginController {
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
return [mainStoryboard instantiateViewControllerWithIdentifier:#"LoginNavController"];
}