Adding time delay to flip animation on navigating view - objective-c

Question

I have a button 'filter' on left side on navigation bar. On clicking it I want flip animation with flip delay of 1.5 second while switching to the next view. How to add the code for that?
I am working with this navigation code:
FilterViewController *vc = [[FilterViewController alloc] init];
vc.delegate = self;
[self.delegate pushViewController:vc animated:UIViewAnimationTransitionFlipFromLeft];
[vc release];
Now I want a flip delay of 1.5 seconds on view switch by button. I have tried some code but it's not giving me the desired result.

Answer 1

Try this
[UIView beginAnimations:#"View Flip" context:nil];
[UIView setAnimationDuration:1.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight
forView:self.navigationController.view cache:NO];
[self.navigationController pushViewController:vc animated:YES];
[UIView commitAnimations];
[vc release];
taken from How to do the flip animation between two UIViewControllers while clicking info button?
Other way:
MainView *nextView = [[MainView alloc] init];
[UIView animateWithDuration:0.75
animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[super pushViewController:nextView animated:NO];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.navigationController.view cache:NO];
}];
I get this from How to change the Push and Pop animations in a navigation based app

Answer 2

Use this for delay the push animation:
FilterViewController *vc = [[FilterViewController alloc] init];
vc.delegate = self;
[self performSelector:#selector(callViewController:) withObject:vc afterDelay:1.5];
-(void)callViewController:(FilterViewController*)vc{
[self.delegate pushViewController:vc animated:UIViewAnimationTransitionFlipFromLeft];
[vc release];
}