Alert View directs to an empty view controller without buttons - uiviewcontroller

Question

I'm trying to make an alert view so that upon selecting "Yes" (one of the buttons in AlertView), the user is directed to a new view controller with a button which I made via Storyboard. My code for the IBAction is as follows:
- (IBAction)alertButton:(UIButton *)sender
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Welcome Back to SymTrack!" message:#"Did you have reoccuring symptoms?" delegate:self cancelButtonTitle:#"No" otherButtonTitles:#"Yes", nil];
[alert show];
}
This is the code for the clickedButtonAtIndex which gives me the empty view controller without the button:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1)
{
UpdateViewController *updateVC = [[UpdateViewController alloc] init];
[self presentViewController:updateVC animated:YES completion:nil];
}
}
I've also tried these other codes for clickedButtonAtIndex but I got NSException for all of them:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1)
{
UpdateViewController *updateVC = [self.storyboard instantiateViewControllerWithIdentifier:#"UpdateViewController"];
[self presentViewController:updateVC animated:YES completion:nil];
}
}
or
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1)
{
UpdateViewController *updateVC = [self.storyboard instantiateViewControllerWithIdentifier:#"UpdateViewController"];
UINavigationController *alertNC = [[UINavigationController alloc] initWithRootViewController:updateVC];
[self presentViewController:updateVC animated:YES completion:nil];
}
}
note: all this code is within the view controller with the button that upon clicking brings the alert view up.
Thanks in advance!