push uiviewcontroller to another viewcontroller with animation from Top - bottom - ios

Question

In my project there is feature when user swipe on top bar one screen will appear with top to bottom animation
There are two view controller
oneviewcontroller.m
- (void)swipe
{
listViewController *list_obj=[[listViewController alloc] initWithNibName:#"listViewController" bundle:NULL];
UIViewAnimationTransition trans = UIViewAnimationTransitionCurlUp;
[UIView beginAnimations: nil context: nil];
[UIView setAnimationTransition: trans forView: [self.view window] cache: YES];
[self.navigationController pushViewController:list_obj animated:YES];
[UIView commitAnimations];
}
But this does not give the animation from top-bottom
I want to implement the navigation from
Push := top - bottom
Pop : = bottom - top
please help me
Thank you

Answer 1

You can push a view controller top to bottom like follows:
Obj-C:
- (void) pushVC:(UIViewController )dstVC {
CATransition *transition = [CATransition animation];
transition.duration = 0.5;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromTop;
[self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
[self.navigationController pushViewController:dstVC animated:NO];
}
Use the below code to pop view controller from Bottom to Top:
- (void) popVC {
CATransition *transition = [CATransition animation];
transition.duration = 0.5;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionFade;
transition.subtype = kCATransitionFromBottom;
[self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
[self.navigationController popViewControllerAnimated:NO];
}
Swift 3:
func open() {
let settingsVC = SettingsVC()
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromTop
navigationController?.view.layer.add(transition, forKey: kCATransition)
navigationController?.pushViewController(settingsVC, animated: false)
}
func close() {
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
transition.type = kCATransitionFade
transition.subtype = kCATransitionFromBottom
navigationController?.view.layer.add(transition, forKey:kCATransition)
let _ = navigationController?.popViewController(animated: false)
}