如何仅在iOS中首次启动时显示视图控制器

Question

I just want to show an operator screen with three operators on the first time when app launches and if i did not selected any operator and i closed the app and again when i open the app i should see that operator screen only but i am going to home view controller. This is my code:

Home ViewController.m

if (![@"1" isEqualToString:[[NSUserDefaults standardUserDefaults]
                            objectForKey:@"aValue"]])
{
    [[NSUserDefaults standardUserDefaults] setValue:@"1" forKey:@"aValue"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    //Action here

    UIViewController *myController = [self.storyboard instantiateViewControllerWithIdentifier:@"Operator"];
    [self.navigationController pushViewController: myController animated:YES];


}
 else
 {
 //self.view.backgroundColor = [UIColor redColor];


 }

Any changes to my code so that i can get the desired result. Thanks in advance....

Answer 1

This code

[[NSUserDefaults standardUserDefaults] setValue:@"1" forKey:@"aValue"];
[[NSUserDefaults standardUserDefaults] synchronize];

should be moved into the view controller in which the user selects the operator. This should be done after the operator is selected and just before dismissing the operator view controller.