Question

In my Application, I have a ViewController that loads up as a welcome screen. You tap “Go” then anther ViewController appears making the user create an account. when the information is submitted, their profile appears. (This is a fun test app) I want to make it so that when the user registers, uses their profile then quits the app, they don’t have to keep re-registering. So I need help detecting the apps first launch, then making the WelcomeViewController and the RegisterViewController go away after first launch.

WelcomeViewController:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

if ([[NSUserDefaults standardUserDefaults] boolForKey:@"hasLaunchedOnce"]) {

    ProfileViewController *profileVC = [[ProfileViewController alloc] initWithNibName:nil bundle:nil];

    [self presentViewController:profileVC animated:NO completion:nil];

} else {

    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"hasLaunchedOnce"];

    [[NSUserDefaults standardUserDefaults] synchronize];

     }
}

RegisterViewController:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

if ([[NSUserDefaults standardUserDefaults] boolForKey:@"hasLaunchedOnce"]) {

    ProfileViewController *profileVC = [[ProfileViewController alloc] initWithNibName:nil bundle:nil];

    [self presentViewController:profileVC animated:NO completion:nil];

} else {

    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"hasLaunchedOnce"];

    [[NSUserDefaults standardUserDefaults] synchronize];

     }
 }

Answer 1

NSUserDefaults is what you are looking for… store the state of the logged in user in NSUserDefaults and check/load it at the application startup…