self.navigationController ==无

Question

I tried to make a simple switch view function but it did not work then I tried to see if the second view is assigned and it was fine. The thing is that my self.navigationControler is nil . How do i fix that ?

ViewController2 *hs=[self.storyboard instantiateViewControllerWithIdentifier:@"Highscore"];
if(self.navigationController==nil)
{

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"YOur Message" message:@"Your description"
                                                   delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
    [alert show];
}


    [self.navigationController pushViewController:hs animated:YES]; 

Answer 1

You will need to present the current view controller from a UINavigationController

UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController:Your_Current_View_Controller];

//Now present controller in any way you want

After that your self.navigationController will not be nil anymoer