我有UINavigationController A，这是UISplitViewController的“左侧”视图控制器，我在UINavigationController B上以模式方式呈现UINavigationController A。此模式演示使用storyboard segue执行，并在Interface Builder中设置以下属性：Kind = Present Modally，Presentation = Over Current Context，Transition = {{ 1}}，Default = Animates
在true的根视图控制器中，我有以下属性：
UINavigationController A
以下是prepareForSegue方法的实现：
let themesTransitionDelegate = ThemesTransitionDelegate() override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
segue.destination.transitioningDelegate = themesTransitionDelegate
segue.destination.view.frame = view.bounds
}
的实施如下：
ThemesTransitionDelegate我的自定义动画在呈现模态时工作正常，但从未调用class ThemesTransitionDelegate: NSObject, UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return ThemesTransitionAnimator()
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
// THIS IS NEVER CALLED!
return ThemesTransitionAnimatorDismiss()
}
}
并且未使用我的自定义解雇动画 - 而是使用标准模态解雇动画。
我正在使用从animationController(forDismissed dismissed: UIViewController)的根视图控制器调用的dismiss(animated: true, completion: nil)来触发解除所呈现的模态。我已确认，当解雇被触发时，UINavigationController B的{{1}}不是零。
这里可能出现什么问题？
答案 0 :(得分：2)
您在故事板中设置了错误的modalPresentationStyle。使用UIModalPresentationCustom：
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
segue.destination.modalPresentationStyle = .custom //Custom presentation
segue.destination.transitioningDelegate = themesTransitionDelegate
segue.destination.view.frame = view.bounds
}