I would like to push a view controller using Swift and animate it so it appears from the bottom and moves up. I have the following code to push my view controller:
Here is the code for pushing
let transition:CATransition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name:CAMediaTimingFunctionName.easeInEaseOut)
transition.type = CATransitionType.push
transition.subtype = CATransitionSubtype.fromBottom
self.hostNavController?.view.layer.add(transition, forKey: kCATransition)
self.hostNavController?.popViewController(animated: true)
and type of transition you can use are
kCATransitionFromLeft
kCATransitionFromBottom
kCATransitionFromRight
kCATransitionFromTop
Controller push in present animation style
let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyBoard.instantiateViewController(withIdentifier: "ViewController") as! ViewController
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
transition.type = CATransitionType.moveIn
transition.subtype = CATransitionSubtype.fromTop
self.navigationController?.view.layer.add(transition, forKey: nil)
self.navigationController?.pushViewController(viewController, animated: false)
let transition:CATransition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name:CAMediaTimingFunctionName.easeInEaseOut)
transition.type = CATransitionType.reveal
transition.subtype = CATransitionSubtype.fromBottom
self.navigationController?.view.layer.add(transition, forKey: kCATransition)
self.navigationController?.popViewController(animated: false)
Swift 4.2+ solution based on Nex Mishra's answer:
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
transition.type = .push
transition.subtype = .fromBottom
navigationController?.view.layer.add(transition, forKey: kCATransition)
navigationController?.pushViewController([destination VC], animated: false)
Swift3:
for push :
// push view controller but animate modally
let storyBoard: UIStoryboard = UIStoryboard(name: "myStoryBoard", bundle: nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "myViewControllerIdentifier") as! MyViewController
let navigationController = self.navigationController
vc.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Close", style: .plain, target: vc, action: #selector(vc.closeView))
vc.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: vc, action: nil)
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
transition.type = kCATransitionMoveIn
transition.subtype = kCATransitionFromTop
navigationController?.view.layer.add(transition, forKey: nil)
navigationController?.pushViewController(vc, animated: false)
and in vc for pop:
func closeView() {
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
transition.type = kCATransitionReveal
transition.subtype = kCATransitionFromBottom
navigationController?.view.layer.add(transition, forKey: nil)
_ = navigationController?.popViewController(animated: false)
}
I had a similar situation where I needed to show a navigation item with some UIBarButtonItems on a view controller, but when presenting modally, it wasn't showing up. It was showing only when pushing from a navigationController, but I really needed the animation from bottom -> up. I tried the CATransition examples from above, but it brought up another bug where there was like a black shadow / translucent background during the animation. I came up with a pretty simple solution in the end:
let someVC = storyboard?.instantiateViewController(withIdentifier: "SomeVC") as! SomeVC
let navController = UINavigationController(rootViewController: someVC)
navigationController?.present(navController, animated: true, completion: nil)
And to close the view controller and get rid of the navigation controller altogether, you just call:
self.dismiss(animated: true, completion: nil)
This will dismiss the view controller, and will release our navigationController from memory.
It is a simple solution in the end, but I spent some time until coming up with it. Maybe I'll save someone else's time :)
let transition:CATransition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
transition.type = CATransitionType.push
transition.subtype = CATransitionSubtype.fromTop
self.navigationController!.view.layer.add(transition, forKey: kCATransition)