Got to another view controller before the current view controller appears

Question

I am trying to to go to a new view controller before the current view controller appears but can't seem to get it. Basically my app, starts on a splash page and checks if you have a saved NSUserDefaults and if yes it opens the main view controller. However I don't want a user to see that view before seeing the main view when they are already a user, it's not user friendly. I want the a current user to see the launch image and then the main view directly. However I can't really get that done. This is what I have done which produces the undesired effect.

- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults]; NSString *user = [prefs stringForKey:@"userName"];

if(user.length>0){
    NSLog(@"Going straight to main %s", "Yes");
    [self performSegueWithIdentifier:@"startMain" sender:self];

  }
}

How an I get around this?

Answer 1

In order to achieve what you want, i. e., don't see the first viewController at all, you have to remove the animation in the transition. Without the animation, the user will see as the secondViewController was the first presented.

You can achieve this in many ways. One of them (assuming it's a modal), would be creating a new segue in the storyboard, with a different identifier and no animation, and calling it if your condition is true.

It would be something like this:

- (void)viewDidAppear:(BOOL)animated {

    [super viewDidAppear:animated];
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults]; NSString *user = [prefs stringForKey:@"userName"];

    if(user.length>0){
        NSLog(@"Going straight to main %s", "Yes");
        [self performSegueWithIdentifier:@"startMain-noAnimation" sender:self];
      }
}