Swift 无法从上到下呈现视图控制器

Question

在我的应用程序中，我必须从上到下呈现屏幕，并且我尝试使用下面的代码提供相同的正常呈现样式。

        let screen = self.storyboard?.instantiateViewController(withIdentifier: "Screen1p5") as? Screen1p5
        let transition = CATransition()
        transition.duration = 0.5
        transition.type = kCATransitionPush
        transition.subtype = kCATransitionFromTop
        view.window!.layer.add(transition, forKey: kCATransition)
        self.present(screen!, animated: true, completion: nil)

Answer 1

为此，您需要将 CATransition 的 subtype 设置为 kCATransitionFromBottom，将连击动画设置为 animated 至 false，并使用 present(_:animated:completion:) .

let screen = self.storyboard?.instantiateViewController(withIdentifier: "Screen1p5") as? Screen1p5
let transition = CATransition()
transition.duration = 0.5
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromBottom
view.window!.layer.add(transition, forKey: kCATransition)
self.present(screen!, animated: false, completion: nil)

要解散，将 CATransition 的 subtype 设置为 kCATransitionFromTop。

let transition = CATransition()
transition.duration = 0.5
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromTop
view.window!.layer.add(transition, forKey: kCATransition)
self.dismiss(animated: false)

Answer 2

刚把它transition.subtype改成了kCATransitionFromBottom

transition.subtype = kCATransitionFromBottom

解散控制器。

let transition = CATransition()
transition.duration = 0.5
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromTop
view.window!.layer.add(transition, forKey: kCATransition)
self.dismiss(animated: true, completion: nil)

请找到下面的 GIF 表示。

If you are using the .XIB then please find the below code.

为目前控制器。

let newController = NewViewController(nibName: "NewView", bundle: nil)
let transition = CATransition()
transition.duration = 0.5
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromBottom
view.window!.layer.add(transition, forKey: kCATransition)
self.present(newController, animated: true, completion: nil)

用于解雇控制器。和上面的代码是一样的。

let transition = CATransition()
transition.duration = 0.5
transition.type = kCATransitionPush
transition.subtype = kCATransitionFromTop
view.window!.layer.add(transition, forKey: kCATransition)
self.dismiss(animated: true, completion: nil)

Swift 无法从上到下呈现视图控制器

Swift Unable to present view controller from top to bottom

catransition

ios

swift

swift3